Merge branch 'master' of git://git.denx.de/u-boot-atmel

i2c: atmel: add i2c driver

Add i2c driver.

Signed-off-by: Songjun Wu <songjun.wu@atmel.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>