dt-bindings: arm: ti: Add bindings for PHYTEC AM62x based hardware

Add devicetree bindings for AM62x based phyCORE-AM62 SoM
and phyBOARD-Lyra RDK.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20230504140143.1425951-1-w.egorov@phytec.de


Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>