arm64: dts: ls1012a: Add FRWY-LS1012A board support

LS1012A-FRWY is an ls1012a based SoC board.
Key features of this board are  Micro SD, USB 3.0,
upto 1GB DDR, UART

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