[PATCH] rtc: bd70528: add dependency to fix build errors

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Fix build errors when MFD_ROHM_BD70528=m, BD70528_WATCHDOG=m,
and RTC_DRV_BD70528=y.  Fixes these build errors:

ld: drivers/rtc/rtc-bd70528.o: in function `bd70528_alm_enable':
rtc-bd70528.c:(.text+0x3a2): undefined reference to `bd70528_wdt_lock'
ld: rtc-bd70528.c:(.text+0x3f8): undefined reference to `bd70528_wdt_unlock'
ld: drivers/rtc/rtc-bd70528.o: in function `bd70528_set_rtc_based_timers':
rtc-bd70528.c:(.text+0x41c): undefined reference to `bd70528_wdt_set'
ld: drivers/rtc/rtc-bd70528.o: in function `bd70528_set_time':
rtc-bd70528.c:(.text+0x500): undefined reference to `bd70528_wdt_lock'
ld: rtc-bd70528.c:(.text+0x587): undefined reference to `bd70528_wdt_unlock'

Also add a blank line to separate the Kconfig entry from the one
above it.

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Lee Jones <lee.jones@xxxxxxxxxx>
Cc: Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx>
Cc: linux-rtc@xxxxxxxxxxxxxxx
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Found in mmotm but applies to linux-next.

 drivers/rtc/Kconfig |    2 ++
 1 file changed, 2 insertions(+)

--- mmotm-2019-0706-2200.orig/drivers/rtc/Kconfig
+++ mmotm-2019-0706-2200/drivers/rtc/Kconfig
@@ -498,8 +498,10 @@ config RTC_DRV_M41T80_WDT
 	help
 	  If you say Y here you will get support for the
 	  watchdog timer in the ST M41T60 and M41T80 RTC chips series.
+
 config RTC_DRV_BD70528
 	tristate "ROHM BD70528 PMIC RTC"
+	depends on MFD_ROHM_BD70528
 	help
 	  If you say Y here you will get support for the RTC
 	  on ROHM BD70528 Power Management IC.