tcg/sparc64: Drop is_64 test from tcg_out_qemu_ld data return

In tcg_canonicalize_memop, we remove MO_SIGN from MO_32 operations
with TCG_TYPE_I32.  Thus this is never set.  We already have an
identical test just above which does not include is_64

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

tcg/sparc64/tcg-target.c.inc

@@ -1220,7 +1220,7 @@ static void tcg_out_qemu_ld(TCGContext *s, TCGReg data, TCGReg addr,
     tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_O2, oi);
 
     /* We let the helper sign-extend SB and SW, but leave SL for here.  */
-    if (is_64 && (memop & MO_SSIZE) == MO_SL) {
+    if ((memop & MO_SSIZE) == MO_SL) {
         tcg_out_ext32s(s, data, TCG_REG_O0);
     } else {
         tcg_out_mov(s, TCG_TYPE_REG, data, TCG_REG_O0);