i2c: sh_i2c.c: adjust for SH73A0

Adjust i2c_raw_read() in sh_i2c.c to work for SH73A0.
After this patch, "i2c md" and "i2c mw" command on U-Boot work properly on KZM-A9-GT board.

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 0132e9d..75b9257 100644
--- a/include/configs/kzm9g.h
+++ b/include/configs/kzm9g.h
@@ -163,7 +163,7 @@
 #define CONFIG_SYS_I2C_SLAVE    (0x7F)
 #define CONFIG_SH_I2C_DATA_HIGH (4)
 #define CONFIG_SH_I2C_DATA_LOW  (5)
-#define CONFIG_SH_I2C_CLOCK     (41666666)
+#define CONFIG_SH_I2C_CLOCK     (104000000) /* 104 MHz */
 #define CONFIG_SH_I2C_BASE0     (0xE6820000)
 #define CONFIG_SH_I2C_BASE1     (0xE6822000)