ssb: make ssb_sdio_switch_core static

It's used locally only.

Signed-off-by: Rafał Miłecki <[e-mail]>
Signed-off-by: Kalle Valo <[e-mail]>

drivers/ssb/sdio.c

···
 }
 
 /* host must be already claimed */
-int ssb_sdio_switch_core(struct ssb_bus *bus, struct ssb_device *dev)
+static int ssb_sdio_switch_core(struct ssb_bus *bus, struct ssb_device *dev)
 {
 	u8 coreidx = dev->core_index;
 	u32 sbaddr;

drivers/ssb/ssb_private.h

···
 				     struct ssb_init_invariants *iv);
 
 extern u32 ssb_sdio_scan_read32(struct ssb_bus *bus, u16 offset);
-extern int ssb_sdio_switch_core(struct ssb_bus *bus, struct ssb_device *dev);
 extern int ssb_sdio_scan_switch_coreidx(struct ssb_bus *bus, u8 coreidx);
 extern int ssb_sdio_hardware_setup(struct ssb_bus *bus);
 extern void ssb_sdio_exit(struct ssb_bus *bus);
···
 extern const struct ssb_bus_ops ssb_sdio_ops;
 #else /* CONFIG_SSB_SDIOHOST */
 static inline u32 ssb_sdio_scan_read32(struct ssb_bus *bus, u16 offset)
-{
-	return 0;
-}
-static inline int ssb_sdio_switch_core(struct ssb_bus *bus,
-					 struct ssb_device *dev)
 {
 	return 0;
 }