ssb: make array pwr_info_offset static const, makes object smaller

Don't populate the array pwr_info_offset on the stack but instead make it
static const. Makes the object code smaller by 207 bytes.

Before:
text data bss dec hex filename
26066 3000 64 29130 71ca drivers/ssb/pci.o

After:
text data bss dec hex filename
25763 3096 64 28923 70fb drivers/ssb/pci.o

(gcc version 9.2.1, amd64)

Signed-off-by: Colin Ian King <[e-mail]>
Acked-by: Michael Büsch <[e-mail]>
Signed-off-by: Kalle Valo <[e-mail]>

drivers/ssb/pci.c

···
 {
 	int i;
 	u16 o;
-	u16 pwr_info_offset[] = {
+	static const u16 pwr_info_offset[] = {
 		SSB_SROM8_PWR_INFO_CORE0, SSB_SROM8_PWR_INFO_CORE1,
 		SSB_SROM8_PWR_INFO_CORE2, SSB_SROM8_PWR_INFO_CORE3
 	};