arm64: dts: ti: Add am62x-phyboard-lyra carrier board

PHYTECs phyBOARD-Lyra carrier board is able to accomidate multiple SoMs.
Refactor k3-am625-phyboard-lyra-rdk.dts into an include file so it can
be reused in combination with our phyCORE-AM62Ax SoM.

Signed-off-by: Garrett Giordano <ggiordano@phytec.com>
Reviewed-by: Wadim Egorov <w.egorov@phytec.de>
Link: https://lore.kernel.org/r/20240626155244.3311436-2-ggiordano@phytec.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

Author: ggiordano32