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/ls1046ardb_emmc_defconfig b/configs/ls1046ardb_emmc_defconfig
index 49d06ae..4005d2e 100644
--- a/configs/ls1046ardb_emmc_defconfig
+++ b/configs/ls1046ardb_emmc_defconfig
@@ -67,7 +67,8 @@
 CONFIG_PCI=y
 CONFIG_DM_PCI=y
 CONFIG_DM_PCI_COMPAT=y
-CONFIG_PCIE_LAYERSCAPE=y
+CONFIG_PCIE_LAYERSCAPE_RC=y
+CONFIG_PCIE_LAYERSCAPE_EP=y
 CONFIG_SYS_QE_FMAN_FW_IN_MMC=y
 CONFIG_DM_SCSI=y
 CONFIG_SYS_NS16550=y