sparc64: Select RTC_CLASS

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/Kconfig

@@ -19,6 +19,7 @@ config SPARC64
 	select USE_GENERIC_SMP_HELPERS if SMP
 	select HAVE_ARCH_TRACEHOOK
 	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select RTC_CLASS
 
 config GENERIC_TIME
 	bool