dt-bindings: PCI: rcar-pci-host: Document missing R-Car H1 support

scripts/checkpatch.pl -f drivers/pci/controller/pcie-rcar-host.c:

WARNING: DT compatible string "renesas,pcie-r8a7779" appears un-documented -- check ./Documentation/devicetree/bindings/
#853: FILE: drivers/pci/controller/pcie-rcar-host.c:853:
+ { .compatible = "renesas,pcie-r8a7779",

Re-add the compatible value for R-Car H1, which was lost during the
json-schema conversion. Make the "resets" property optional on R-Car
H1, as it is not present yet on R-Car Gen1 SoCs.

Fixes: 0d69ce3c2c63d4db ("dt-bindings: PCI: rcar-pci-host: Convert bindings to json-schema")
Signed-off-by: Geert Uytterhoeven <[e-mail]>
Link: https://lore.kernel.org/r/fb0bb[e-mail]
Signed-off-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/pci/rcar-pci-host.yaml

···
 properties:
   compatible:
     oneOf:
+      - const: renesas,pcie-r8a7779       # R-Car H1
       - items:
           - enum:
               - renesas,pcie-r8a7742      # RZ/G1H
···
   - clocks
   - clock-names
   - power-domains
-  - resets
+
+if:
+  not:
+    properties:
+      compatible:
+        contains:
+          const: renesas,pcie-r8a7779
+then:
+  required:
+    - resets
 
 unevaluatedProperties: false