dt-bindings: display: convert simple lg panels to DT Schema

Add the lg panels that matches the panel-simple binding to
panel-simple.yaml

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Brian Masney <masneyb@onstation.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Brian Masney <masneyb@onstation.org>
Cc: Alexandre Courbot <acourbot@chromium.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200408195109.32692-16-sam@ravnborg.org

Documentation/devicetree/bindings/display/panel/lg,acx467akm-7.txt

-LG ACX467AKM-7 4.95" 1080×1920 LCD Panel
-
-Required properties:
-- compatible: must be "lg,acx467akm-7"
-
-This binding is compatible with the simple-panel binding, which is specified
-in simple-panel.txt in this directory.

Documentation/devicetree/bindings/display/panel/lg,ld070wx3-sl01.txt

-LG Corporation 7" WXGA TFT LCD panel
-
-Required properties:
-- compatible: should be "lg,ld070wx3-sl01"
-
-This binding is compatible with the simple-panel binding, which is specified
-in simple-panel.txt in this directory.

Documentation/devicetree/bindings/display/panel/lg,lh500wx1-sd03.txt

-LG Corporation 5" HD TFT LCD panel
-
-Required properties:
-- compatible: should be "lg,lh500wx1-sd03"
-
-This binding is compatible with the simple-panel binding, which is specified
-in simple-panel.txt in this directory.

Documentation/devicetree/bindings/display/panel/panel-simple.yaml

@@ -153,8 +153,14 @@ properties:
       - kyo,tcg121xglp
         # LeMaker BL035-RGB-002 3.5" QVGA TFT LCD panel
       - lemaker,bl035-rgb-002
+        # LG ACX467AKM-7 4.95" 1080×1920 LCD Panel
+      - lg,acx467akm-7
         # LG 7" (800x480 pixels) TFT LCD panel
       - lg,lb070wv8
+        # LG Corporation 7" WXGA TFT LCD panel
+      - lg,ld070wx3-sl01
+        # LG Corporation 5" HD TFT LCD panel
+      - lg,lh500wx1-sd03
         # LG LP079QX1-SP0V 7.9" (1536x2048 pixels) TFT LCD panel
       - lg,lp079qx1-sp0v
         # LG 9.7" (2048x1536 pixels) TFT LCD panel