ARM: dts: at91: rearrange kizbox dts using aliases nodes

Use aliases nodes to easy kizbox dts readability.

Signed-off-by: Kamel Bouhara <kamel.bouhara@bootlin.com>
Link: https://lore.kernel.org/r/20191205223021.1370083-1-kamel.bouhara@bootlin.com


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>