arch/arm/boot/dts/zynq-zc706-adv7511-ad9250-fmc-250ebz: use axi-iic

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
arch/arm/boot/dts/zynq-zed-adv7511-xcomm: Reduce DAC rate and enable interpolation

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>