pci: layerscape: Add specific config entry for RC and EP mode driver

Add Root Complex and Endpoint mode specific config entries, such that
it's feasible to enable the RC and/or EP mode driver indepently.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/configs/ls1012ardb_qspi_defconfig b/configs/ls1012ardb_qspi_defconfig
index dbca32e..cbfa0d5 100644
--- a/configs/ls1012ardb_qspi_defconfig
+++ b/configs/ls1012ardb_qspi_defconfig
@@ -55,7 +55,7 @@
 CONFIG_PCI=y
 CONFIG_DM_PCI=y
 CONFIG_DM_PCI_COMPAT=y
-CONFIG_PCIE_LAYERSCAPE=y
+CONFIG_PCIE_LAYERSCAPE_RC=y
 CONFIG_DM_RTC=y
 CONFIG_DM_SCSI=y
 CONFIG_SYS_NS16550=y