dt-bindings: arm: nxp: Add device tree binding for ls1046a-frwy board

Add "fsl,ls1046a-frwy" bindings for ls1046afrwy board based on ls1046a SoC

Signed-off-by: Vabhav Sharma <vabhav.sharma@nxp.com>
Signed-off-by: Pramod Kumar <pramod.kumar_1@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>