target-or32: Add target stubs and QOM cpu

Add OpenRISC target stubs, QOM cpu and basic machine.

Signed-off-by: Jia Liu <proljc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/target-openrisc/Makefile.objs b/target-openrisc/Makefile.objs
new file mode 100644
index 0000000..ef933ef
--- /dev/null
+++ b/target-openrisc/Makefile.objs
@@ -0,0 +1,3 @@
+obj-$(CONFIG_SOFTMMU) += machine.o
+obj-y += cpu.o interrupt.o mmu.o translate.o
+obj-y += mmu_helper.o