hw/sparc64/Makefile.objs: Create CONFIG_* for sparc64

Add the new configs to default-configs/sparc64-sofmmu.mak.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20190202072456.6468-20-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

default-configs/sparc64-softmmu.mak

@@ -17,3 +17,5 @@ CONFIG_SUNHME=y
 CONFIG_MC146818RTC=y
 CONFIG_ISA_TESTDEV=y
 CONFIG_SUN4V_RTC=y
+CONFIG_SUN4U=y
+CONFIG_NIAGARA=y

hw/sparc64/Makefile.objs

@@ -1,4 +1,4 @@
 obj-y += sparc64.o
-obj-y += sun4u_iommu.o
-obj-y += sun4u.o
-obj-y += niagara.o
+obj-$(CONFIG_SUN4U) += sun4u_iommu.o
+obj-$(CONFIG_SUN4U) += sun4u.o
+obj-$(CONFIG_NIAGARA) += niagara.o