arm64: dts: qcom: sc8180x: Fix eDP PHY power-domains

arm64: dts: qcom: sc8180x: Fix eDP PHY power-domains

[ Upstream commit 24e98cb3d5e2c86565680e00008a794b4eac0040 ]

The (e)DP PHYs are powered by the MX line, not through the MDSS GDSC.
Fix that up.

Fixes: 494dec9b6f54 ("arm64: dts: qcom: sc8180x: Add display and gpu nodes")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20231230-topic-8180_more_fixes-v1-5-93b5c107ed43@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>