sh: add support for sh7757lcr board

The R0P7757LC0030RL board has SH7757, 256MB DDR3-SDRAM, SPI ROM,
Ethernet, and more.

This patch supports the following functions:
 - 256MB DDR3-SDRAM
 - SPI ROM
 - Ethernet

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/sh/include/asm/cpu_sh4.h b/arch/sh/include/asm/cpu_sh4.h
index fdcebd6..9b29d3a 100644
--- a/arch/sh/include/asm/cpu_sh4.h
+++ b/arch/sh/include/asm/cpu_sh4.h
@@ -44,6 +44,8 @@
 # include <asm/cpu_sh7722.h>
 #elif defined (CONFIG_CPU_SH7723)
 # include <asm/cpu_sh7723.h>
+#elif defined (CONFIG_CPU_SH7757)
+# include <asm/cpu_sh7757.h>
 #elif defined (CONFIG_CPU_SH7763)
 # include <asm/cpu_sh7763.h>
 #elif defined (CONFIG_CPU_SH7780)