pci: ls_pcie_g4: add device tree fixups for PCI Stream IDs

Add the infrastructure for Layerscape SoCs PCIe Gen4 controller
to update device tree nodes to convey SMMU stream IDs in the
device tree.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index 7f585aa..8ee828a 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -32,6 +32,7 @@
 obj-$(CONFIG_PCIE_DW_MVEBU) += pcie_dw_mvebu.o
 obj-$(CONFIG_PCIE_LAYERSCAPE) += pcie_layerscape.o
 obj-$(CONFIG_PCIE_LAYERSCAPE) += pcie_layerscape_fixup.o
-obj-$(CONFIG_PCIE_LAYERSCAPE_GEN4) += pcie_layerscape_gen4.o
+obj-$(CONFIG_PCIE_LAYERSCAPE_GEN4) += pcie_layerscape_gen4.o \
+				pcie_layerscape_gen4_fixup.o
 obj-$(CONFIG_PCI_XILINX) += pcie_xilinx.o
 obj-$(CONFIG_PCIE_INTEL_FPGA) += pcie_intel_fpga.o