ARM: S5PV310: Add I2C channel 3, 4, 5, 6, and 7 device support

S5PV310 and S5PC210 support more I2C devices than previous SoCs.
Add the device support code for them.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>