dt-bindings: PCI: intel: Fix dt_binding_check compilation failure

Remove <dt-bindings/clock/intel,lgm-clk.h> dependency as
it is not present in the mainline tree. Use numeric value
instead of LGM_GCLK_PCIE10 macro.
Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com>
[robh: Also drop interrupt-parent from example]
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml

@@ -107,7 +107,6 @@ additionalProperties: false
 examples:
   - |
     #include <dt-bindings/gpio/gpio.h>
-    #include <dt-bindings/clock/intel,lgm-clk.h>
     pcie10: pcie@d0e00000 {
       compatible = "intel,lgm-pcie", "snps,dw-pcie";
       device_type = "pci";
@@ -120,7 +119,6 @@ examples:
       linux,pci-domain = <0>;
       max-link-speed = <4>;
       bus-range = <0x00 0x08>;
-      interrupt-parent = <&ioapic1>;
       #interrupt-cells = <1>;
       interrupt-map-mask = <0 0 0 0x7>;
       interrupt-map = <0 0 0 1 &ioapic1 27 1>,
@@ -129,7 +127,7 @@ examples:
                       <0 0 0 4 &ioapic1 30 1>;
       ranges = <0x02000000 0 0xd4000000 0xd4000000 0 0x04000000>;
       resets = <&rcu0 0x50 0>;
-      clocks = <&cgu0 LGM_GCLK_PCIE10>;
+      clocks = <&cgu0 120>;
       phys = <&cb0phy0>;
       phy-names = "pcie";
       reset-assert-ms = <500>;