driver:i2c:s3c24x0: adapt driver to new i2c

This patch adapts the s3c24x0 driver to the new i2c framework.
Config file is modified for all the boards that use the driver.

Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Minkyu Kang <mk7.kang@samsung.com>
CC: Heiko Schocher <hs@denx.de>
CC: Inderpal Singh <inderpal.singh@linaro.org>
CC: David Müller <d.mueller@elsoft.ch>
CC: Chander Kashyap <k.chander@samsung.com>
CC: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>