rtc: spacemit: MFD_SPACEMIT_P1 as dependencies

RTC_DRV_SPACEMIT_P1 is a subdevice of P1 and should depend on
MFD_SPACEMIT_P1 rather than selecting it directly. Using 'select'
does not always respect the parent's dependencies, so 'depends on'
is the safer and more correct choice.

Additionally, the default value depends on MFD_SPACEMIT_P1 rather
than ARCH_SPACEMIT.

Signed-off-by: Troy Mitchell <[e-mail]>
Acked-by: Alex Elder <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Alexandre Belloni <[e-mail]>

drivers/rtc/Kconfig

···
 config RTC_DRV_SPACEMIT_P1
 	tristate "SpacemiT P1 RTC"
 	depends on ARCH_SPACEMIT || COMPILE_TEST
-	select MFD_SPACEMIT_P1
-	default ARCH_SPACEMIT
+	depends on MFD_SPACEMIT_P1
+	default MFD_SPACEMIT_P1
 	help
 	  Enable support for the RTC function in the SpacemiT P1 PMIC.
 	  This driver can also be built as a module, which will be called