sh: move CONFIG_{SH2, SH2A, SH3, SH4} to Kconfig

This commit moves CONFIG_SH2, CONFIG_SH2A, CONFIG_SH3, CONFIG_SH4
to Kconfig renaming into CONFIG_CPU_SH2, CONFIG_CPU_SH2A,
CONFIG_CPU_SH3, CONFIG_CPU_SH4, respectively because
arch/sh/Kconfig of Linux uses CONFIG_CPU_SH* convention.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/sh/include/asm/cache.h b/arch/sh/include/asm/cache.h
index 0698a37..abaf405 100644
--- a/arch/sh/include/asm/cache.h
+++ b/arch/sh/include/asm/cache.h
@@ -1,7 +1,7 @@
 #ifndef __ASM_SH_CACHE_H
 #define __ASM_SH_CACHE_H
 
-#if defined(CONFIG_SH4)
+#if defined(CONFIG_CPU_SH4)
 
 int cache_control(unsigned int cmd);
 
@@ -18,7 +18,7 @@
  */
 #define ARCH_DMA_MINALIGN	32
 
-#endif /* CONFIG_SH4 */
+#endif /* CONFIG_CPU_SH4 */
 
 /*
  * Use the L1 data cache line size value for the minimum DMA buffer alignment