ARM: dts: at91: sama7g5/sama7g5ek: align with Linux DT

Align the DT for sama7g5 SoC and sama7g5 EK board with Linux devicetree
in version 5.18.

Some things remain still different, due to some things yet unimplemented in
certain drivers. These include in PMC, pinctrl, and others.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>