i2c: sh_i2c.c: support I2C2, I2C3 and I2C4

sh_i2c.c support I2C0 and I2C1. This patch extends it to I2C4.

Acked-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
diff --git a/include/configs/kzm9g.h b/include/configs/kzm9g.h
index 75b9257..4898fb6 100644
--- a/include/configs/kzm9g.h
+++ b/include/configs/kzm9g.h
@@ -157,7 +157,7 @@
 #define CONFIG_SH_I2C_8BIT
 #define CONFIG_HARD_I2C
 #define CONFIG_I2C_MULTI_BUS
-#define CONFIG_SYS_MAX_I2C_BUS  (2)
+#define CONFIG_SYS_MAX_I2C_BUS  (5)
 #define CONFIG_SYS_I2C_MODULE
 #define CONFIG_SYS_I2C_SPEED    (100000) /* 100 kHz */
 #define CONFIG_SYS_I2C_SLAVE    (0x7F)
@@ -166,5 +166,8 @@
 #define CONFIG_SH_I2C_CLOCK     (104000000) /* 104 MHz */
 #define CONFIG_SH_I2C_BASE0     (0xE6820000)
 #define CONFIG_SH_I2C_BASE1     (0xE6822000)
+#define CONFIG_SH_I2C_BASE2     (0xE6824000)
+#define CONFIG_SH_I2C_BASE3     (0xE6826000)
+#define CONFIG_SH_I2C_BASE4     (0xE6828000)
 
 #endif /* __KZM9G_H */