dt-bindings: PCI: rcar-gen4-pci-host: Document Application/Local register reset

The R-Car Gen4 PCIe controller does contain core reset, which puts
the controller back into well-defined state, but it does also tear
down the PCIe link. This is called Application/Local register reset
in the documentation. Document this reset.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
[bhelgaas: squash maxItems fix from
https://patch.msgid.link/20260925203039.110653-1-marek.vasut+renesas@mailbox.org]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260903205153.283553-1-marek.vasut+renesas@mailbox.org

Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml

@@ -47,11 +47,14 @@ properties:
     maxItems: 1
 
   resets:
-    maxItems: 1
+    minItems: 1
+    maxItems: 2
 
   reset-names:
+    minItems: 1
     items:
       - const: pwr
+      - const: core
 
   max-link-speed:
     maximum: 4
@@ -141,8 +144,8 @@ examples:
             clocks = <&cpg CPG_MOD 624>, <&pcie0_clkref>;
             clock-names = "core", "ref";
             power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
-            resets = <&cpg 624>;
-            reset-names = "pwr";
+            resets = <&cpg 624>,<&cpg 1121>;
+            reset-names = "pwr", "core";
             max-link-speed = <4>;
             num-lanes = <2>;
             #address-cells = <3>;