arm64: dts: r8a7796: salvator-x: Add I2C for DVFS device support

This patch adds support of I2C for DVFS device for Salvator-X board on
R8A7796 SoC.
Signed-off-by: NDien Pham <dien.pham.ry@rvc.renesas.com>
Signed-off-by: NTakeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts

@@ -261,3 +261,7 @@
 	timeout-sec = <60>;
 	status = "okay";
 };
+
+&i2c_dvfs {
+	status = "okay";
+};