hwmon: (bt1-pvt) Mark is_visible functions static

0-day reports:

drivers/hwmon/bt1-pvt.c:303:16: warning:
no previous declaration for 'pvt_limit_is_visible'
drivers/hwmon/bt1-pvt.c:308:16: warning:
no previous declaration for 'pvt_alarm_is_visible'

Declare both functions static.

Reported-by: kernel test robot <[e-mail]>
Fixes: 87976ce2825d("hwmon: Add Baikal-T1 PVT sensor driver")
Cc: Serge Semin <[e-mail]>
Reviewed-by: Serge Semin <[e-mail]>
Signed-off-by: Guenter Roeck <[e-mail]>

drivers/hwmon/bt1-pvt.c

···
 	return IRQ_HANDLED;
 }
 
-inline umode_t pvt_limit_is_visible(enum pvt_sensor_type type)
+static inline umode_t pvt_limit_is_visible(enum pvt_sensor_type type)
 {
 	return 0644;
 }
 
-inline umode_t pvt_alarm_is_visible(enum pvt_sensor_type type)
+static inline umode_t pvt_alarm_is_visible(enum pvt_sensor_type type)
 {
 	return 0444;
 }
···
 
 #define pvt_soft_isr NULL
 
-inline umode_t pvt_limit_is_visible(enum pvt_sensor_type type)
+static inline umode_t pvt_limit_is_visible(enum pvt_sensor_type type)
 {
 	return 0;
 }
 
-inline umode_t pvt_alarm_is_visible(enum pvt_sensor_type type)
+static inline umode_t pvt_alarm_is_visible(enum pvt_sensor_type type)
 {
 	return 0;
 }