drivers/pci : enable pcie_layerscape code for lx2160a rev2

lx2160a rev1 uses pcie_layerscape_gen4 driver and lx2160a rev2 uses
pcie_layerscape driver.
Enable pcie_layerscape code for CONFIG_PCIE_LAYERSCAPE_GEN4.
Based on SoC and revision pcie controller probe will be invoked.

Signed-off-by: Wasim Khan <wasim.khan@nxp.com>
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index da8b826..8a33eb0 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -36,7 +36,7 @@
 obj-$(CONFIG_PCIE_LAYERSCAPE) += pcie_layerscape.o
 obj-$(CONFIG_PCIE_LAYERSCAPE) += pcie_layerscape_fixup.o
 obj-$(CONFIG_PCIE_LAYERSCAPE_GEN4) += pcie_layerscape_gen4.o \
-				pcie_layerscape_gen4_fixup.o
+				pcie_layerscape_gen4_fixup.o pcie_layerscape.o
 obj-$(CONFIG_PCI_XILINX) += pcie_xilinx.o
 obj-$(CONFIG_PCI_PHYTIUM) += pcie_phytium.o
 obj-$(CONFIG_PCIE_INTEL_FPGA) += pcie_intel_fpga.o