dt-bindings: PCI: brcm,iproc-pcie: Fix example indentation

The example's indentation is off. While fixing this, the 'bus' node
is unnecessary and can be dropped. It is also preferred to split up
unrelated examples to their own entries.
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230926155351.31117-1-robh@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/pci/brcm,iproc-pcie.yaml

@@ -119,10 +119,7 @@ examples:
   - |
     #include <dt-bindings/interrupt-controller/arm-gic.h>
 
-   bus {
-      #address-cells = <1>;
-      #size-cells = <1>;
-           pcie0: pcie@18012000 {
+    pcie@18012000 {
         compatible = "brcm,iproc-pcie";
         reg = <0x18012000 0x1000>;
 
@@ -159,8 +156,8 @@ examples:
                     <GIC_SPI 99 IRQ_TYPE_NONE>;
         };
     };
-
-           pcie1: pcie@18013000 {
+  - |
+    pcie@18013000 {
         compatible = "brcm,iproc-pcie";
         reg = <0x18013000 0x1000>;
 
@@ -181,4 +178,3 @@ examples:
         phys = <&phy 1 6>;
         phy-names = "pcie-phy";
     };
-    };