build: move device tree to per-target Makefile.objs

Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Makefile.target

@@ -149,13 +149,6 @@ else
 obj-y += hw/$(TARGET_BASE_ARCH)/
 endif
 
-# Device tree
-ifeq ($(CONFIG_FDT), y)
-obj-$(TARGET_ARM) += device_tree.o
-obj-$(TARGET_MICROBLAZE) += device_tree.o
-obj-$(TARGET_PPC) += device_tree.o
-endif
-
 main.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
 
 GENERATED_HEADERS += hmp-commands.h qmp-commands-old.h

hw/arm/Makefile.objs

@@ -35,5 +35,6 @@ obj-y += vexpress.o
 obj-y += strongarm.o
 obj-y += collie.o
 obj-y += pl041.o lm4549.o
+obj-$(CONFIG_FDT) += ../device_tree.o
 
 obj-y := $(addprefix ../,$(obj-y))

hw/microblaze/Makefile.objs

@@ -9,5 +9,6 @@ obj-y += xilinx_uartlite.o
 obj-y += xilinx_ethlite.o
 obj-y += xilinx_axidma.o
 obj-y += xilinx_axienet.o
+obj-$(CONFIG_FDT) += ../device_tree.o
 
 obj-y := $(addprefix ../,$(obj-y))

hw/ppc/Makefile.objs

@@ -21,6 +21,7 @@ obj-y += virtex_ml507.o
 obj-$(CONFIG_KVM) += kvm_ppc.o
 # PowerPC OpenPIC
 obj-y += openpic.o
+obj-$(CONFIG_FDT) += ../device_tree.o
 
 # Xilinx PPC peripherals
 obj-y += xilinx_intc.o