hw/misc/edu: Compile the edu device as common object

edu.c does not contain any target-specific code, so we can put
it into common-obj-y to compile it only once for all targets.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Message-Id: <1498454578-18709-8-git-send-email-thuth@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

hw/misc/Makefile.objs

@@ -6,6 +6,7 @@ common-obj-$(CONFIG_ISA_DEBUG) += debugexit.o
 common-obj-$(CONFIG_SGA) += sga.o
 common-obj-$(CONFIG_ISA_TESTDEV) += pc-testdev.o
 common-obj-$(CONFIG_PCI_TESTDEV) += pci-testdev.o
+common-obj-$(CONFIG_EDU) += edu.o
 
 common-obj-y += unimp.o
 
@@ -53,7 +54,6 @@ obj-$(CONFIG_MIPS_CPS) += mips_cpc.o
 obj-$(CONFIG_MIPS_ITU) += mips_itu.o
 
 obj-$(CONFIG_PVPANIC) += pvpanic.o
-obj-$(CONFIG_EDU) += edu.o
 obj-$(CONFIG_HYPERV_TESTDEV) += hyperv_testdev.o
 obj-$(CONFIG_AUX) += auxbus.o
 obj-$(CONFIG_ASPEED_SOC) += aspeed_scu.o aspeed_sdmc.o