dt-bindings: phy: qcom,qmp-ufs: rename current bindings

The current QMP UFS PHY bindings are based on the original MSM8996 PCIe
PHY binding which provided multiple PHYs per IP block and these in turn
were described by child nodes.

The QMP UFS PHY block only provide a single PHY and the remnant child
node does not really reflect the hardware.

The original MSM8996 binding also ended up describing the individual
register blocks as belonging to either the wrapper node or the PHY child
nodes.

This is an unnecessary level of detail which has lead to problems when
later IP blocks using different register layouts have been forced to fit
the original mould rather than updating the binding. The bindings are
arguable also incomplete as they only the describe register blocks used
by the current Linux drivers.

In preparation for adding new bindings for SC8280XP which further
bindings can be based on, rename the current bindings after MSM8996 and
add a reference to the SC8280XP bindings.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221024090041.19574-8-johan+linaro@kernel.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/qcom,qmp-ufs-phy.yaml → Documentation/devicetree/bindings/phy/qcom,msm8996-qmp-ufs-phy.yaml

 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/phy/qcom,qmp-ufs-phy.yaml#
+$id: http://devicetree.org/schemas/phy/qcom,msm8996-qmp-ufs-phy.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Qualcomm QMP PHY controller (UFS)
+title: Qualcomm QMP PHY controller (UFS, MSM8996)
 
 maintainers:
   - Vinod Koul <vkoul@kernel.org>
@@ -13,6 +13,9 @@ description:
   QMP PHY controller supports physical layer functionality for a number of
   controllers on Qualcomm chipsets, such as, PCIe, UFS, and USB.
 
+  Note that these bindings are for SoCs up to SC8180X. For newer SoCs, see
+  qcom,sc8280xp-qmp-ufs-phy.yaml.
+
 properties:
   compatible:
     enum: