mfd: db8500-prcmu: Remove unused inline functions

Since commit b0e84624 ("mfd: db8500-prcmu: Remove dead code for a non-existing config")
these inline helpers also no need any more.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230720143738.13996-1-yuehaibing@huawei.comSigned-off-by: Lee Jones <lee@kernel.org>

include/linux/mfd/dbx500-prcmu.h

@@ -556,16 +556,6 @@ static inline void prcmu_clear(unsigned int reg, u32 bits)
 #define PRCMU_QOS_ARM_OPP 3
 #define PRCMU_QOS_DEFAULT_VALUE -1
 
-static inline unsigned long prcmu_qos_get_cpufreq_opp_delay(void)
-{
-	return 0;
-}
-
-static inline int prcmu_qos_requirement(int prcmu_qos_class)
-{
-	return 0;
-}
-
 static inline int prcmu_qos_add_requirement(int prcmu_qos_class,
 					    char *name, s32 value)
 {
@@ -582,15 +572,4 @@ static inline void prcmu_qos_remove_requirement(int prcmu_qos_class, char *name)
 {
 }
 
-static inline int prcmu_qos_add_notifier(int prcmu_qos_class,
-					 struct notifier_block *notifier)
-{
-	return 0;
-}
-static inline int prcmu_qos_remove_notifier(int prcmu_qos_class,
-					    struct notifier_block *notifier)
-{
-	return 0;
-}
-
 #endif /* __MACH_PRCMU_H */