sysreset: at91: add compatible with microchip, sama7g5-rstc

As documented in bindings doc in kernel 6.0:
https://elixir.bootlin.com/linux/v6.0/source/Documentation/devicetree/bindings/reset/atmel,at91sam9260-reset.yaml

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>

drivers/sysreset/sysreset_at91.c

@@ -59,6 +59,7 @@ static struct sysreset_ops at91_sysreset = {
 static const struct udevice_id a91_sysreset_ids[] = {
 	{ .compatible = "atmel,sama5d3-rstc" },
 	{ .compatible = "microchip,sam9x60-rstc" },
+	{ .compatible = "microchip,sama7g5-rstc" },
 	{ }
 };