arm: ls1021a: Enable PCIe in defconfigs

The patch enables PCIe in ls1021a defconfigs and
removes unused PCIe related macro defines.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/configs/ls1021atwr_sdcard_ifc_SECURE_BOOT_defconfig b/configs/ls1021atwr_sdcard_ifc_SECURE_BOOT_defconfig
index 2d32e96..3e05a25 100644
--- a/configs/ls1021atwr_sdcard_ifc_SECURE_BOOT_defconfig
+++ b/configs/ls1021atwr_sdcard_ifc_SECURE_BOOT_defconfig
@@ -44,7 +44,6 @@
 CONFIG_SPL_DM=y
 CONFIG_NETDEVICES=y
 CONFIG_E1000=y
-CONFIG_PCI=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_USB_XHCI_HCD=y
@@ -54,3 +53,7 @@
 CONFIG_RSA=y
 CONFIG_SPL_RSA=y
 CONFIG_OF_LIBFDT=y
+CONFIG_PCI=y
+CONFIG_DM_PCI=y
+CONFIG_DM_PCI_COMPAT=y
+CONFIG_PCIE_LAYERSCAPE=y