ARM: dts: at91: sama5d2_icp: enable digital filter for I2C nodes

SAMA5D2's I2C controller supports digital filter, so let's enable it.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210727134115.1353494-1-codrin.ciubotariu@microchip.com