Add some missing static and const qualifiers, reg_names only used if NDEBUG set

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5421 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/tcg/ppc64/tcg-target.c b/tcg/ppc64/tcg-target.c
index ff10c37..4943514 100644
--- a/tcg/ppc64/tcg-target.c
+++ b/tcg/ppc64/tcg-target.c
@@ -42,6 +42,7 @@
 #define CMP_L (1<<21)
 #endif
 
+#ifndef NDEBUG
 static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
     "r0",
     "r1",
@@ -76,6 +77,7 @@
     "r30",
     "r31"
 };
+#endif
 
 static const int tcg_target_reg_alloc_order[] = {
     TCG_REG_R14,