arm64: dts: qcom: x1e80100-vivobook-s15: fix PCIe4 PHY supply

The PCIe4 PHY is powered by vreg_l3i (not vreg_l3j) on the CRD reference
design so assume the same applies to the Asus Vivobook S15.

Fixes: d0e2f8f6 ("arm64: dts: qcom: Add device tree for ASUS Vivobook S 15")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240722095459.27437-6-johan+linaro@kernel.org


Signed-off-by: Bjorn Andersson <andersson@kernel.org>