arm64: defconfig: Enable CONFIG_PCIE_LAYERSCAPE_GEN4

Enable the PCIe Gen4 controller driver for Layerscape SoCs.
Signed-off-by: NHou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: NMinghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm64/configs/defconfig

@@ -195,6 +195,7 @@ CONFIG_PCI_HOST_THUNDER_ECAM=y
 CONFIG_PCIE_ROCKCHIP_HOST=m
 CONFIG_PCIE_BRCMSTB=m
 CONFIG_PCI_LAYERSCAPE=y
+CONFIG_PCIE_LAYERSCAPE_GEN4=y
 CONFIG_PCI_HISI=y
 CONFIG_PCIE_QCOM=y
 CONFIG_PCIE_ARMADA_8K=y