ARM: shmobile: Include i2c-shmobile.c in shmobile_defconfig

Many SoCs include I2C controller instances compatible with
the i2c-shmobile.c driver. To increase hardware support enable
the driver in the shmobile_defconfig multiplatform configuration.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Acked-by: NWolfram Sang <wsa@the-dreams.de>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/configs/shmobile_defconfig

@@ -75,6 +75,7 @@ CONFIG_SERIAL_SH_SCI=y
 CONFIG_SERIAL_SH_SCI_NR_UARTS=20
 CONFIG_SERIAL_SH_SCI_CONSOLE=y
 CONFIG_I2C_GPIO=y
+CONFIG_I2C_SH_MOBILE=y
 CONFIG_I2C_RCAR=y
 CONFIG_SPI=y
 CONFIG_SPI_RSPI=y