ARM: S5P6442: Enable I2C0 device on SMDK6442

This patch enables I2C0 device for WM8580 on SMDK6442.

Signed-off-by: Jassi Brar <jassi.brar@samsung.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
[kgene.kim@samsung.com: minor changed title and description]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>