bcma: remove unused mips_read32 function

clang with W=1 reports
drivers/bcma/driver_mips.c:49:19: error: unused function
'mips_read32' [-Werror,-Wunused-function]
static inline u32 mips_read32(struct bcma_drv_mips *mcore,
^
This function is not used so remove it.

Signed-off-by: Tom Rix <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Signed-off-by: Kalle Valo <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/bcma/driver_mips.c

···
 	       dev->id.id == BCMA_CORE_USB20_HOST;
 }
 
-static inline u32 mips_read32(struct bcma_drv_mips *mcore,
-			      u16 offset)
-{
-	return bcma_read32(mcore->core, offset);
-}
-
 static u32 bcma_core_mips_irqflag(struct bcma_device *dev)
 {
 	u32 flag;