arm64: dts: renesas: renesas-smarc2: Move usb3 nodes to board DTS

The SMARC2 board DTSI is common to multiple SoCs.  Move the USB3 nodes
to the board DTS, as some SoCs (e.g. RZ/G3[SL]) do not support USB3.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://patch.msgid.link/20260324114329.268249-11-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts

@@ -280,7 +280,13 @@
 	vqmmc-supply = <&vqmmc_sd1_pvdd>;
 };
 
+&usb3_phy {
+	status = "okay";
+};
+
 &xhci {
 	pinctrl-0 = <&usb3_pins>;
 	pinctrl-names = "default";
+
+	status = "okay";
 };

arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi

@@ -111,11 +111,3 @@
 
 	status = "okay";
 };
-
-&usb3_phy {
-	status = "okay";
-};
-
-&xhci {
-	status = "okay";
-};