arm64: dts: renesas: r8a774e1: Rename i2c_dvfs to iic_pmic

As RZ/G2 SoCs do not support DVFS, the "iic-dvfs" module was renamed to
"iic-pmic" in the RZ/G Series, 2nd Generation User’s Manual: Hardware
Rev. 1.00.

See also commit a636d803 ("arm64: dts: renesas: rzg2: Rename
i2c_dvfs to iic_pmic"), which apparently forgot to update RZ/G2H.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/7d60653d4d63904dc025a133297a53eb885fa064.1661525361.git.geert+renesas@glider.be

arch/arm64/boot/dts/renesas/r8a774e1.dtsi

@@ -769,7 +769,7 @@ i2c6: i2c@e66e8000 {
 			status = "disabled";
 		};
 
-		i2c_dvfs: i2c@e60b0000 {
+		iic_pmic: i2c@e60b0000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "renesas,iic-r8a774e1",