arm64: dts: qcom: msm8998-fxtec: Add QUSB2PHY VDD supply

Set the supply as required by bindings, to silence the warning:

'vdd-supply' is a required property

The value is inferred from MTP schematics, but it shouldn't change
between boards due to specific electrical characteristics.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250327-topic-more_dt_bindings_fixes-v2-6-b763d958545f@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: quic-kdybcio

arch/arm64/boot/dts/qcom/msm8998-fxtec-pro1.dts

@@ -372,6 +372,7 @@
 &qusb2phy {
 	status = "okay";
 
+	vdd-supply = <&vreg_l1a_0p875>;
 	vdda-pll-supply = <&vreg_l12a_1p8>;
 	vdda-phy-dpdm-supply = <&vreg_l24a_3p075>;
 };