arm64: dts: ti: Add TQ-Systems TQMa64XxL SoM and MBaX4XxL carrier board Device Trees

The TQMa64XxL is an LGA SoM based on the TI AM64x SoC family. Add DTS(I)
for the AM642 (2x Cortex-A53) variant and its combination with our
MBaX4XxL carrier board.

Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Link: https://lore.kernel.org/r/2a635428c73b5ab0fe793e558db6b5d88edccf8c.1690463382.git.matthias.schiffer@ew.tq-group.com


Signed-off-by: Nishanth Menon <nm@ti.com>