arm64: dts: qcom: sc7280: Fix qmp phy node (use phy@ instead of lanes@)

Fix the 'make dtbs_check' warning:

arch/arm64/boot/dts/qcom/sc7280-idp.dt.yaml: phy@1c0e000:
  'lanes@1c0e200' does not match any of the regexes: '^phy@[0-9a-f]+$', 'pinctrl-[0-9]+'

Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220228123019.382037-5-bhupesh.sharma@linaro.org