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/lx2160ardb_tfa_stmm_defconfig b/configs/lx2160ardb_tfa_stmm_defconfig
index e97c9b0..38d3bbb 100644
--- a/configs/lx2160ardb_tfa_stmm_defconfig
+++ b/configs/lx2160ardb_tfa_stmm_defconfig
@@ -66,8 +66,8 @@
 CONFIG_PCI=y
 CONFIG_DM_PCI=y
 CONFIG_DM_PCI_COMPAT=y
-CONFIG_PCIE_LAYERSCAPE=y
-CONFIG_PCIE_LAYERSCAPE_GEN4=y
+CONFIG_PCIE_LAYERSCAPE_RC=y
+CONFIG_PCIE_LAYERSCAPE_RC_GEN4=y
 CONFIG_DM_RTC=y
 CONFIG_RTC_PCF2127=y
 CONFIG_DM_SCSI=y