powerpc: T4RDB: Compile legacy PCIe routines conditionally

Compile the legacy PCIe initialization routines only when
DM_PCI is not enabled.
Signed-off-by: NHou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NPrabhakar Kushwaha <prabhakar.kushwaha@nxp.com>

board/freescale/t4rdb/pci.c

@@ -11,6 +11,7 @@
 #include <fdt_support.h>
 #include <asm/fsl_serdes.h>
 
+#if !defined(CONFIG_DM_PCI)
 void pci_init_board(void)
 {
 	fsl_pcie_init_board(0);
@@ -20,3 +21,4 @@ void pci_of_setup(void *blob, bd_t *bd)
 {
 	FT_FSL_PCI_SETUP;
 }
+#endif