arm64: dts: nxp: add ls1046a-frwy board support

ls1046afrwy board is based on nxp ls1046a SoC.
Board support's 4GB ddr memory, i2c, microSD card,
serial console,qspi nor flash,ifc nand flash,qsgmii network interface,
usb 3.0 and serdes interface to support two x1gen3 pcie interface.

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