MLK-14271 ARM64: configs: defconfig: remove unused configs to fix build warnings

MLK-14271 ARM64: configs: defconfig: remove unused configs to fix build warnings

Remove unused configs to fix below build warnings:

  CC      drivers/pci/host/pci-layerscape.o
drivers/pci/host/pci-layerscape.c:182:2: warning: initialization from incompatible pointer type
  .host_init = ls1021_pcie_host_init,
  ^
drivers/pci/host/pci-layerscape.c:182:2: warning: (near initialization for ‘ls1021_pcie_host_ops.host_init’)
drivers/pci/host/pci-layerscape.c:188:2: warning: initialization from incompatible pointer type
  .host_init = ls_pcie_host_init,
  ^
drivers/pci/host/pci-layerscape.c:188:2: warning: (near initialization for ‘ls_pcie_host_ops.host_init’)
  CC      drivers/pci/host/pcie-qcom.o
drivers/pci/host/pcie-qcom.c:482:2: warning: initialization from incompatible pointer type
  .host_init = qcom_pcie_host_init,
  ^
drivers/pci/host/pcie-qcom.c:482:2: warning: (near initialization for ‘qcom_pcie_dw_ops.host_init’)
  CC      drivers/pci/host/pcie-armada8k.o
drivers/pci/host/pcie-armada8k.c:164:2: warning: initialization from incompatible pointer type
  .host_init = armada8k_pcie_host_init,
  ^
drivers/pci/host/pcie-armada8k.c:164:2: warning: (near initialization for ‘armada8k_pcie_host_ops.host_init’)
  LD      drivers/pci/host/built-in.o
  LD      drivers/pci/built-in.o

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>