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/ls1021aqds_sdcard_qspi_defconfig b/configs/ls1021aqds_sdcard_qspi_defconfig
index 49bcba0..34de544 100644
--- a/configs/ls1021aqds_sdcard_qspi_defconfig
+++ b/configs/ls1021aqds_sdcard_qspi_defconfig
@@ -45,7 +45,6 @@
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_NETDEVICES=y
 CONFIG_E1000=y
-CONFIG_PCI=y
 CONFIG_SYS_NS16550=y
 CONFIG_DM_SPI=y
 CONFIG_FSL_DSPI=y
@@ -55,3 +54,7 @@
 CONFIG_USB_XHCI_DWC3=y
 CONFIG_USB_STORAGE=y
 # CONFIG_VIDEO_SW_CURSOR is not set
+CONFIG_PCI=y
+CONFIG_DM_PCI=y
+CONFIG_DM_PCI_COMPAT=y
+CONFIG_PCIE_LAYERSCAPE=y