tcg-ppc64: Fix compile errors for userspace only builds with gcc 4.6

tcg/ppc64/tcg-target.c has a couple of places where variables are set
unconditionally, but otherwise used only for softmmu builds, not
userspace only builds.  This causes compiler warnings (which are fatal
by default) when compiling for a ppc64 host with gcc 4.6.  This patch
fixes the problem by moving the code which defines and sets the
variables into the CONFIG_SOFTMMU guarded regions.
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NAlexander Graf <agraf@suse.de>

tcg/ppc64/tcg-target.c

@@ -616,18 +616,19 @@ static void tcg_out_tlb_read (TCGContext *s, int r0, int r1, int r2,
 
 static void tcg_out_qemu_ld (TCGContext *s, const TCGArg *args, int opc)
 {
-    int addr_reg, data_reg, r0, r1, rbase, mem_index, s_bits, bswap;
+    int addr_reg, data_reg, r0, r1, rbase, bswap;
 #ifdef CONFIG_SOFTMMU
-    int r2;
+    int r2, mem_index, s_bits;
     void *label1_ptr, *label2_ptr;
 #endif
 
     data_reg = *args++;
     addr_reg = *args++;
+
+#ifdef CONFIG_SOFTMMU
     mem_index = *args;
     s_bits = opc & 3;
 
-#ifdef CONFIG_SOFTMMU
     r0 = 3;
     r1 = 4;
     r2 = 0;
@@ -763,17 +764,18 @@ static void tcg_out_qemu_ld (TCGContext *s, const TCGArg *args, int opc)
 
 static void tcg_out_qemu_st (TCGContext *s, const TCGArg *args, int opc)
 {
-    int addr_reg, r0, r1, rbase, data_reg, mem_index, bswap;
+    int addr_reg, r0, r1, rbase, data_reg, bswap;
 #ifdef CONFIG_SOFTMMU
-    int r2;
+    int r2, mem_index;
     void *label1_ptr, *label2_ptr;
 #endif
 
     data_reg = *args++;
     addr_reg = *args++;
-    mem_index = *args;
 
 #ifdef CONFIG_SOFTMMU
+    mem_index = *args;
+
     r0 = 3;
     r1 = 4;
     r2 = 0;