Create a library file for libfdt

TF Makefile was linking all the objects files generated for the
fdt library instead of creating a static library that could be
used in the linking stage.

Change-Id: If3705bba188ec39e1fbf2322a7f2a9a941e1b90d
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
diff --git a/plat/qemu/platform.mk b/plat/qemu/platform.mk
index 379ab3d..1d46eec 100644
--- a/plat/qemu/platform.mk
+++ b/plat/qemu/platform.mk
@@ -132,8 +132,7 @@
 				plat/qemu/qemu_io_storage.c		\
 				plat/qemu/${ARCH}/plat_helpers.S	\
 				plat/qemu/qemu_bl2_setup.c		\
-				plat/qemu/dt.c				\
-				$(LIBFDT_SRCS)
+				plat/qemu/dt.c
 ifeq (${LOAD_IMAGE_V2},1)
 BL2_SOURCES		+=	plat/qemu/qemu_bl2_mem_params_desc.c	\
 				plat/qemu/qemu_image_load.c		\