ARM: at91: add uart0 to sama5d3 DT

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
ARM: at91: add i2c2 pinctrl speficifation to sama5d3 DT

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Merge branch 'at91-3.10-trunk/v3.10_drivers' into linux-3.10-at91