sh: Get SH-5 caches working again post-unification.

A number of cleanups to get the SH-5 cache management code in line with
the rest of the SH backend.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/cpu-sh5/cacheflush.h b/include/asm-sh/cpu-sh5/cacheflush.h
index f935acb..5a11f0b 100644
--- a/include/asm-sh/cpu-sh5/cacheflush.h
+++ b/include/asm-sh/cpu-sh5/cacheflush.h
@@ -3,8 +3,6 @@
 
 #ifndef __ASSEMBLY__
 
-#include <asm/page.h>
-
 struct vm_area_struct;
 struct page;
 struct mm_struct;
@@ -27,7 +25,7 @@
 #define flush_dcache_mmap_unlock(mapping)	do { } while (0)
 
 #define flush_icache_page(vma, page)	do { } while (0)
-#define p3_cache_init()			do { } while (0)
+void p3_cache_init(void);
 
 #endif /* __ASSEMBLY__ */