sparc64: Use generic CMOS driver.

Based largely upon a patch by Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/include/asm/mc146818rtc_64.h

@@ -7,12 +7,8 @@
 #include <asm/io.h>
 
 #ifndef RTC_PORT
-#ifdef CONFIG_PCI
-extern unsigned long ds1287_regs;
-#else
-#define ds1287_regs (0UL)
-#endif
-#define RTC_PORT(x)	(ds1287_regs + (x))
+extern unsigned long cmos_regs;
+#define RTC_PORT(x)	(cmos_regs + (x))
 #define RTC_ALWAYS_BCD	0
 #endif
 
@@ -29,6 +25,4 @@ outb_p((addr),RTC_PORT(0)); \
 outb_p((val),RTC_PORT(1)); \
 })
 
-#define RTC_IRQ 8
-
 #endif /* __ASM_SPARC64_MC146818RTC_H */

arch/sparc64/Kconfig

@@ -21,6 +21,7 @@ config SPARC64
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select RTC_CLASS
 	select RTC_DRV_M48T59
+	select RTC_DRV_CMOS
 
 config GENERIC_TIME
 	bool