dt-bindings: phy: migrate QMP UFS PHY bindings to qcom,sc8280xp-qmp-ufs-phy.yaml

Migrate legacy bindings (described in qcom,msm8996-qmp-ufs-phy.yaml)
to qcom,sc8280xp-qmp-ufs-phy.yaml. This removes a need to declare
the child PHY node or split resource regions.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230711145153.4167820-2-dmitry.baryshkov@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>