pci: layerscape: Common device tree fixup for NXP SoCs

Add Common device tree fixup for NXP SoCs. Based on
SoC and revision call pcie_layerscape or pcie_layerscape_gen4
fixup.

Signed-off-by: Wasim Khan <wasim.khan@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/drivers/pci/pcie_layerscape_fixup_common.h b/drivers/pci/pcie_layerscape_fixup_common.h
new file mode 100644
index 0000000..be729b6
--- /dev/null
+++ b/drivers/pci/pcie_layerscape_fixup_common.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2019-2020 NXP
+ *
+ * PCIe DT fixup for NXP Layerscape SoCs
+ * Author: Wasim Khan <wasim.khan@nxp.com>
+ *
+ */
+#ifndef _PCIE_LAYERSCAPE_FIXUP_COMMON_H_
+#define _PCIE_LAYERSCAPE_FIXUP_COMMON_H_
+
+#include <common.h>
+
+void ft_pci_setup_ls(void *blob, bd_t *bd);
+
+#ifdef CONFIG_PCIE_LAYERSCAPE_GEN4
+void ft_pci_setup_ls_gen4(void *blob, bd_t *bd);
+#endif /* CONFIG_PCIE_LAYERSCAPE_GEN4 */
+
+#endif //_PCIE_LAYERSCAPE_FIXUP_COMMON_H_