[PATCH -next] rtc: fsl-ftm-alarm: Fix build error without PM_SLEEP

[YueHaibing]

When do randbuild, Kconfig warning this:

WARNING: unmet direct dependencies detected for FSL_RCPM
  Depends on [n]: PM_SLEEP [=y] && (ARM || ARM64)
  Selected by [y]:
  - RTC_DRV_FSL_FTM_ALARM [=y] && RTC_CLASS [=y] && (ARCH_LAYERSCAPE || SOC_LS1021A || COMPILE_TEST [=y])

Add PM_SLEEP dependency to fix this.

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Fixes: e1c2feb1efa2 ("rtc: fsl-ftm-alarm: allow COMPILE_TEST")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/rtc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 4185b0d..2bbf8ae 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1326,6 +1326,7 @@ config RTC_DRV_IMXDI
 config RTC_DRV_FSL_FTM_ALARM
 	tristate "Freescale FlexTimer alarm timer"
 	depends on ARCH_LAYERSCAPE || SOC_LS1021A || COMPILE_TEST
+	depends on PM_SLEEP
 	select FSL_RCPM
 	default y
 	help
-- 
2.7.4