reference exact dtb for qemu vexpress

target/arm/Makefile

@@ -175,7 +175,7 @@ ifeq ($(ADK_TARGET_SYSTEM_QEMU_ARM_XILINX_ZYNQ),y)
 endif
 ifeq ($(ADK_TARGET_SYSTEM_QEMU_ARM_VEXPRESS_A9),y)
 	env $(KERNEL_MAKE_ENV) $(MAKE) -C "${LINUX_DIR}" $(KERNEL_MAKE_OPTS) \
-		dtbs $(MAKE_TRACE)
+		vexpress-v2p-ca9.dtb $(MAKE_TRACE)
 endif
 ifeq ($(ADK_TARGET_SYSTEM_QEMU_ARM_REALVIEW_EB_MPCORE),y)
 	env $(KERNEL_MAKE_ENV) $(MAKE) -C "${LINUX_DIR}" $(KERNEL_MAKE_OPTS) \