Unify '-cpu ?' option.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3380 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index f4d9004..b424abc 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -697,6 +697,7 @@
 #define cpu_exec cpu_ppc_exec
 #define cpu_gen_code cpu_ppc_gen_code
 #define cpu_signal_handler cpu_ppc_signal_handler
+#define cpu_list ppc_cpu_list
 
 #include "cpu-all.h"