sh: cache: Change cache API to defines as U-Boot

A chache API of SH is developped by reference in linux kernel.
And API was the same as the linux kernel.
This patch change cache API to defines as U-Boot.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/sh/cpu/sh4/cache.c b/arch/sh/cpu/sh4/cache.c
index 1947ec8..e1ee970 100644
--- a/arch/sh/cpu/sh4/cache.c
+++ b/arch/sh/cpu/sh4/cache.c
@@ -91,7 +91,7 @@
 	return 0;
 }
 
-void dcache_wback_range(u32 start, u32 end)
+void flush_dcache_range(unsigned long start, unsigned long end)
 {
 	u32 v;
 
@@ -102,7 +102,7 @@
 	}
 }
 
-void dcache_invalid_range(u32 start, u32 end)
+void invalidate_dcache_range(unsigned long start, unsigned long end)
 {
 	u32 v;