tcg/ppc: Fix typo

Signed-off-by: malc <av1474@comtv.ru>
diff --git a/tcg/ppc/tcg-target.c b/tcg/ppc/tcg-target.c
index 9fe11bb..6f044d6 100644
--- a/tcg/ppc/tcg-target.c
+++ b/tcg/ppc/tcg-target.c
@@ -51,7 +51,7 @@
 static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
     "r0",
     "r1",
-    "rp",
+    "r2",
     "r3",
     "r4",
     "r5",