[PATCH v2] macintosh: via-pmu and via-cuda need RTC_LIB

[Randy Dunlap]

Fix build when RTC_LIB is not set/enabled.
Eliminates these build errors:

m68k-linux-ld: drivers/macintosh/via-pmu.o: in function `pmu_set_rtc_time':
drivers/macintosh/via-pmu.c:1769: undefined reference to `rtc_tm_to_time64'
m68k-linux-ld: drivers/macintosh/via-cuda.o: in function `cuda_set_rtc_time':
drivers/macintosh/via-cuda.c:797: undefined reference to `rtc_tm_to_time64'

Fixes: 0792a2c8e0bb ("macintosh: Use common code to access RTC")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Suggested-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Finn Thain <fthain@xxxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
---
v2: use RTC_LIB instead of open-coding the call to rtc_tm_to_time64()

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

--- a/drivers/macintosh/Kconfig
+++ b/drivers/macintosh/Kconfig
@@ -44,6 +44,7 @@ config ADB_IOP
 config ADB_CUDA
 	bool "Support for Cuda/Egret based Macs and PowerMacs"
 	depends on (ADB || PPC_PMAC) && !PPC_PMAC64
+	select RTC_LIB
 	help
 	  This provides support for Cuda/Egret based Macintosh and
 	  Power Macintosh systems. This includes most m68k based Macs,
@@ -57,6 +58,7 @@ config ADB_CUDA
 config ADB_PMU
 	bool "Support for PMU based PowerMacs and PowerBooks"
 	depends on PPC_PMAC || MAC
+	select RTC_LIB
 	help
 	  On PowerBooks, iBooks, and recent iMacs and Power Macintoshes, the
 	  PMU is an embedded microprocessor whose primary function is to