MLK-21076-4 regulator: pfuze100: Fix build warning when CONFIG_PM_SLEEP=n

MLK-21076-4 regulator: pfuze100: Fix build warning when CONFIG_PM_SLEEP=n

Fix below build warning when CONFIG_PM_SLEEP=n:

drivers/regulator/pfuze100-regulator.c:743:12: warning:
 'pfuze_resume' defined but not used [-Wunused-function]
 static int pfuze_resume(struct device *dev)
            ^~~~~~~~~~~~
drivers/regulator/pfuze100-regulator.c:717:12: warning:
 'pfuze_suspend' defined but not used [-Wunused-functio ]
 static int pfuze_suspend(struct device *dev)
            ^~~~~~~~~~~~~

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
(cherry picked from commit 36fb6ba8ad9f3a5eb6d883e53c5bb42cd5aec3ce)