ARM: dts: BCM5301X: remove duplicate compatible on ASUS RT-AC3100 & AC88U

The compatible property on the node with the srab handle is already
described with the same value on the included device tree. Remove it.

Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Link: https://lore.kernel.org/r/20240414-for-soc-asus-rt-ac3100-improvements-v1-3-0e40caf1a70a@arinc9.com


Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>