sparc: unify kernel/cpu

o use cpu_32.c as base
o move all sparc64 definitions to the common cpu.c
o use ifdef for the parts that differs and use cpu_32 as base
o spitfire.h required a CONFIG_SPARC64 guard to fix build on 32 bit

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/include/asm/spitfire.h b/arch/sparc/include/asm/spitfire.h
index 985ea7e..f0d0c40c4 100644
--- a/arch/sparc/include/asm/spitfire.h
+++ b/arch/sparc/include/asm/spitfire.h
@@ -6,6 +6,8 @@
 #ifndef _SPARC64_SPITFIRE_H
 #define _SPARC64_SPITFIRE_H
 
+#ifdef CONFIG_SPARC64
+
 #include <asm/asi.h>
 
 /* The following register addresses are accessible via ASI_DMMU
@@ -338,5 +340,5 @@
 }
 
 #endif /* !(__ASSEMBLY__) */
-
+#endif /* CONFIG_SPARC64 */
 #endif /* !(_SPARC64_SPITFIRE_H) */