fix(fvp): correct default dtb filename

The file 'dtb.bin' is the correct name of the kernel DTB file.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: I0e15cc1d30ba097cf7b161c6e2ae3737cc49f41b
diff --git a/fvp_utils.sh b/fvp_utils.sh
index 23cf293..1a789d6 100644
--- a/fvp_utils.sh
+++ b/fvp_utils.sh
@@ -37,7 +37,7 @@
 rootfs_url="$linaro_release/lt-vexpress64-openembedded_minimal-armv8-gcc-5.2_20170127-761.img.gz"
 
 # Default FVP model variables
-default_model_dtb="fvp-base-gicv3-psci.dtb"
+default_model_dtb="dtb.bin"
 
 # FVP containers and model paths
 fvp_arm_std_library_11_12="fvp:fvp_arm_std_library_${model_version_11_12}_${model_build_11_12};/opt/model/FVP_ARM_Std_Library/models/${model_flavour_11_12}"