mfd: db8500-prcmu: Remove unused function

Remove the function prcmu_get_boot_status() that is not used anywhere.

This was partially found by using a static code analysis program called cppcheck.
Signed-off-by: NRickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

drivers/mfd/db8500-prcmu.c

@@ -674,15 +674,6 @@ bool prcmu_has_arm_maxopp(void)
 		PRCM_AVS_ISMODEENABLE_MASK) == PRCM_AVS_ISMODEENABLE_MASK;
 }
 
-/**
- * prcmu_get_boot_status - PRCMU boot status checking
- * Returns: the current PRCMU boot status
- */
-int prcmu_get_boot_status(void)
-{
-	return readb(tcdm_base + PRCM_BOOT_STATUS);
-}
-
 /**
  * prcmu_set_rc_a2p - This function is used to run few power state sequences
  * @val: Value to be set, i.e. transition requested