dt-bindings: PCI: fsl,layerscape-pcie-ep: Drop unnecessary status from example

Device nodes in the examples are supposed to be enabled, so the schema
will be validated against them. Keeping them disabled hides potential
errors.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Krzysztof Wilczyński <[e-mail]>
Reviewed-by: Frank Li <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/devicetree/bindings/pci/fsl,layerscape-pcie-ep.yaml

···
         reg-names = "regs", "addr_space";
         interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /* PME interrupt */
         interrupt-names = "pme";
-        status = "disabled";
       };
     };
 ...