dt-bindings: phy: intel: Add Keem Bay eMMC PHY bindings

Binding description for Intel Keem Bay eMMC PHY.
Signed-off-by: Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200913235522.4316-3-wan.ahmad.zainie.wan.mohamad@intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.yaml

@@ -23,7 +23,9 @@ description: |+
 
 properties:
   compatible:
-    const: intel,lgm-emmc-phy
+    oneOf:
+      - const: intel,lgm-emmc-phy
+      - const: intel,keembay-emmc-phy
 
   "#phy-cells":
     const: 0
@@ -34,6 +36,10 @@ properties:
   clocks:
     maxItems: 1
 
+  clock-names:
+    items:
+      - const: emmcclk
+
 required:
   - "#phy-cells"
   - compatible
@@ -57,4 +63,13 @@ examples:
         #phy-cells = <0>;
       };
     };
+
+  - |
+    phy@20290000 {
+          compatible = "intel,keembay-emmc-phy";
+          reg = <0x20290000 0x54>;
+          clocks = <&emmc>;
+          clock-names = "emmcclk";
+          #phy-cells = <0>;
+    };
 ...