arm64: dts: mt8173: change node name

- Change the node name from "mt6397" to "pmic" to be consistent
with the generic names recommendation.

Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221005-mt6357-support-v8-5-560caaafee53@baylibre.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi

@@ -913,7 +913,7 @@
 };
 
 &pwrap {
-	pmic: mt6397 {
+	pmic: pmic {
 		compatible = "mediatek,mt6397";
 		#address-cells = <1>;
 		#size-cells = <1>;

arch/arm64/boot/dts/mediatek/mt8173-evb.dts

@@ -300,7 +300,7 @@
 	/* Only MT8173 E1 needs USB power domain */
 	power-domains = <&spm MT8173_POWER_DOMAIN_USB>;
 
-	pmic: mt6397 {
+	pmic: pmic {
 		compatible = "mediatek,mt6397";
 		interrupt-parent = <&pio>;
 		interrupts = <11 IRQ_TYPE_LEVEL_HIGH>;