ARM: dts: microchip: at91-sama7g5ek: Add reg_5v to supply PMIC nodes

Align with the datasheet by adding regulator-5v which supplies
each node from the regulator using phandle to regulator-5v
through pvin[1-4]-supply and lvin-supply.

Co-developed-by: Mihai Sain <mihai.sain@microchip.com>
Signed-off-by: Mihai Sain <mihai.sain@microchip.com>
Signed-off-by: Andrei Simion <andrei.simion@microchip.com>
Link: https://lore.kernel.org/r/20240812135231.43744-4-andrei.simion@microchip.com


Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>