sh: Nopped out p3_cache_init() on SH-5 also.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

include/asm-sh/cpu-sh5/cacheflush.h

@@ -27,6 +27,7 @@ extern void flush_icache_user_range(struct vm_area_struct *vma,
 #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)
 
 #endif /* __ASSEMBLY__ */