[SPARC]: Fix RTC build failure.

On sparc and sparc64, the rtc driver doesn't compile with PCI support 
disabled.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/char/Kconfig

@@ -687,7 +687,7 @@ config NVRAM
 
 config RTC
 	tristate "Enhanced Real Time Clock Support"
-	depends on !PPC32 && !PARISC && !IA64 && !M68K
+	depends on !PPC32 && !PARISC && !IA64 && !M68K && (!(SPARC32 || SPARC64) || PCI)
 	---help---
 	  If you say Y here and create a character special file /dev/rtc with
 	  major number 10 and minor number 135 using mknod ("man mknod"), you