si2135: Declare the structs even if frontend is not enabled

As reported by Kbuildtest:

In file included from drivers/media/usb/cx231xx/cx231xx-dvb.c:35:0:
drivers/media/dvb-frontends/si2165.h:57:9: warning: 'struct si2165_config' declared inside parameter list [enabled by default]
struct i2c_adapter *i2c)
^
drivers/media/dvb-frontends/si2165.h:57:9: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
drivers/media/usb/cx231xx/cx231xx-dvb.c:157:21: error: variable 'hauppauge_930C_HD_1113xx_si2165_config' has initializer but incomplete type
static const struct si2165_config hauppauge_930C_HD_1113xx_si2165_config = {
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:158:2: error: unknown field 'i2c_addr' specified in initializer
.i2c_addr = 0x64,
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:158:2: warning: excess elements in struct initializer [enabled by default]
drivers/media/usb/cx231xx/cx231xx-dvb.c:158:2: warning: (near initialization for 'hauppauge_930C_HD_1113xx_si2165_config') [enabled by default]
drivers/media/usb/cx231xx/cx231xx-dvb.c:159:2: error: unknown field 'chip_mode' specified in initializer
.chip_mode = SI2165_MODE_PLL_XTAL,
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:159:15: error: 'SI2165_MODE_PLL_XTAL' undeclared here (not in a function)
.chip_mode = SI2165_MODE_PLL_XTAL,
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:159:2: warning: excess elements in struct initializer [enabled by default]
.chip_mode = SI2165_MODE_PLL_XTAL,
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:159:2: warning: (near initialization for 'hauppauge_930C_HD_1113xx_si2165_config') [enabled by default]
drivers/media/usb/cx231xx/cx231xx-dvb.c:160:2: error: unknown field 'ref_freq_Hz' specified in initializer
.ref_freq_Hz = 16000000,
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:160:2: warning: excess elements in struct initializer [enabled by default]
drivers/media/usb/cx231xx/cx231xx-dvb.c:160:2: warning: (near initialization for 'hauppauge_930C_HD_1113xx_si2165_config') [enabled by default]
>> drivers/media/usb/cx231xx/cx231xx-dvb.c:163:21: error: variable 'pctv_quatro_stick_1114xx_si2165_config' has initializer but incomplete type
static const struct si2165_config pctv_quatro_stick_1114xx_si2165_config = {
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:164:2: error: unknown field 'i2c_addr' specified in initializer
.i2c_addr = 0x64,
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:164:2: warning: excess elements in struct initializer [enabled by default]
>> drivers/media/usb/cx231xx/cx231xx-dvb.c:164:2: warning: (near initialization for 'pctv_quatro_stick_1114xx_si2165_config') [enabled by default]
drivers/media/usb/cx231xx/cx231xx-dvb.c:165:2: error: unknown field 'chip_mode' specified in initializer
.chip_mode = SI2165_MODE_PLL_EXT,
^
>> drivers/media/usb/cx231xx/cx231xx-dvb.c:165:15: error: 'SI2165_MODE_PLL_EXT' undeclared here (not in a function)
.chip_mode = SI2165_MODE_PLL_EXT,
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:165:2: warning: excess elements in struct initializer [enabled by default]
.chip_mode = SI2165_MODE_PLL_EXT,
^
>> drivers/media/usb/cx231xx/cx231xx-dvb.c:165:2: warning: (near initialization for 'pctv_quatro_stick_1114xx_si2165_config') [enabled by default]
drivers/media/usb/cx231xx/cx231xx-dvb.c:166:2: error: unknown field 'ref_freq_Hz' specified in initializer
.ref_freq_Hz = 24000000,
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:166:2: warning: excess elements in struct initializer [enabled by default]
>> drivers/media/usb/cx231xx/cx231xx-dvb.c:166:2: warning: (near initialization for 'pctv_quatro_stick_1114xx_si2165_config') [enabled by default]
drivers/media/usb/cx231xx/cx231xx-dvb.c: In function 'dvb_init':
drivers/media/usb/cx231xx/cx231xx-dvb.c:731:3: warning: passing argument 1 of 'si2165_attach' from incompatible pointer type [enabled by default]
dev->dvb->frontend = dvb_attach(si2165_attach,
^
In file included from drivers/media/usb/cx231xx/cx231xx-dvb.c:35:0:
drivers/media/dvb-frontends/si2165.h:55:36: note: expected 'const struct si2165_config *' but argument is of type 'const struct si2165_config *'
static inline struct dvb_frontend *si2165_attach(
^
drivers/media/usb/cx231xx/cx231xx-dvb.c:764:3: warning: passing argument 1 of 'si2165_attach' from incompatible pointer type [enabled by default]
dev->dvb->frontend = dvb_attach(si2165_attach,
^
In file included from drivers/media/usb/cx231xx/cx231xx-dvb.c:35:0:
drivers/media/dvb-frontends/si2165.h:55:36: note: expected 'const struct si2165_config *' but argument is of type 'const struct si2165_config *'
static inline struct dvb_frontend *si2165_attach(
^

That happens because the frontend was disabled by .config, but the
si2165_attach void stub require those structs, and also the
drivers that call it.

While here, remove the duplicated info about the possible I2C
addresses.

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/dvb-frontends/si2165.h

···
 
 #include <linux/dvb/frontend.h>
 
-#if IS_ENABLED(CONFIG_DVB_SI2165)
-
 enum {
 	SI2165_MODE_OFF = 0x00,
 	SI2165_MODE_PLL_EXT = 0x20,
···
 	bool inversion;
 };
 
-/* Addresses: 0x64,0x65,0x66,0x67 */
+#if IS_ENABLED(CONFIG_DVB_SI2165)
 struct dvb_frontend *si2165_attach(
 	const struct si2165_config *config,
 	struct i2c_adapter *i2c);