Remove parenthesis from return statements in i386.md.

gcc/config/i386/i386.md

@@ -3032,7 +3032,7 @@
   "TARGET_64BIT || TARGET_SSE"
 {
   /* This insn should be already split before reg-stack.  */
-  return ("#");
+  return "#";
 }
   [(set_attr "isa" "*,x64")
    (set_attr "type" "multi")
@@ -3087,7 +3087,7 @@
   ""
 {
   /* This insn should be already split before reg-stack.  */
-  return ("#");
+  return "#";
 }
   [(set_attr "isa" "*,*,*,nox64,x64")
    (set_attr "type" "multi")
@@ -3123,7 +3123,7 @@
   ""
 {
   /* This insn should be already split before reg-stack.  */
-  return ("#");
+  return "#";
 }
   [(set_attr "isa" "*,nox64,nox64,nox64,x64,sse2")
    (set_attr "type" "multi")
@@ -3157,7 +3157,7 @@
 {
   /* Anything else should be already split before reg-stack.  */
   if (which_alternative != 1)
-    return ("#");
+    return "#";
   return "push{q}\t%q1";
 }
   [(set_attr "type" "multi,push,multi")
@@ -3171,7 +3171,7 @@
 {
   /* Anything else should be already split before reg-stack.  */
   if (which_alternative != 1)
-    return ("#");
+    return "#";
   return "push{l}\t%1";
 }
   [(set_attr "type" "multi,push,multi")