target-sparc: Revert setting cpu_dst to gen_dest_gpr

There is some read-after-write error within the OP=2 insns which
prevents setting cpu_dst to the real output register.  Until this
is found and fixed, always write to a temporary first.

Cc: Blue Swirl <blauwirbel@gmail.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Tested-by: NAurelien Jarno <aurelien@aurel32.net>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

target-sparc/translate.c

@@ -2633,7 +2633,7 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
     case 2:                     /* FPU & Logical Operations */
         {
             unsigned int xop = GET_FIELD(insn, 7, 12);
-            TCGv cpu_dst = gen_dest_gpr(dc, rd);
+            TCGv cpu_dst = get_temp_tl(dc);
             TCGv cpu_tmp0;
 
             if (xop == 0x3a) {  /* generate trap */