ARM: at91: sama5d4: remove i2c pin sleep state configure

As the i2c will use to access device when the device connect to
i2c bus as a wake up source. So, if it in sleep state, it cna not
read the device correctly.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Bo Shen <voice.shen@atmel.com>