arm64: dts: imx8mp: Add analog audio output on i.MX8MP TQMa8MPxL/MBa8MPxL
Enable SAI3, add the codec and pinctrl nodes to enable audio support on MBa8MPxL. Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>