i2c-gpio is sometimes used in place of i2c-at91.
This adds the pin muxes for the gpios.
Signed-off-by: NRichard Genoud <richard.genoud@gmail.com>
Acked-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>