fix(layerscape): fix build issue of mmap_add_ddr_region_dynamically

Fix build issue of mmap_add_ddr_region_dynamically():
ls_bl2_el3_setup.c:(.text.bl2_plat_preload_setup+0x28): undefined
reference to mmap_add_ddr_region_dynamically

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Change-Id: I74a8b4c2337fc0646d6acb16ce61755c5efbdf38
diff --git a/plat/nxp/common/setup/ls_bl2_el3_setup.c b/plat/nxp/common/setup/ls_bl2_el3_setup.c
index 5b5144d..14422e2 100644
--- a/plat/nxp/common/setup/ls_bl2_el3_setup.c
+++ b/plat/nxp/common/setup/ls_bl2_el3_setup.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2020 NXP
+ * Copyright 2018-2022 NXP
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -289,8 +289,9 @@
 	if ((dram_regions_info.region[0].addr == 0)
 		&& (dram_regions_info.total_dram_size > 0)) {
 		populate_dram_regions_info();
-
+#ifdef PLAT_XLAT_TABLES_DYNAMIC
 		mmap_add_ddr_region_dynamically();
+#endif
 	}
 
 	/* setup the memory region access permissions */