[AArch64] Fix usage of +no in error message for aarch64_parse_extension

	* config/aarch64/aarch64.c (aarch64_parse_extension): Update error
	message to say +no only when removing extension.

From-SVN: r218626

gcc/ChangeLog

+2014-12-11  Kyrylo Tkachov  kyrylo.tkachov@arm.com
+
+	* config/aarch64/aarch64.c (aarch64_parse_extension): Update error
+	message to say +no only when removing extension.
+
 2014-12-11  Andrew MacLeod  <amacleod@redhat.com>
 
 	* config/tilepro/gen-mul-tables.cc: Add insn-codes.h to include list

gcc/config/aarch64/aarch64.c

@@ -6532,7 +6532,8 @@ aarch64_parse_extension (char *str)
 
       if (len == 0)
 	{
-	  error ("missing feature modifier after %qs", "+no");
+	  error ("missing feature modifier after %qs", adding_ext ? "+"
+	                                                          : "+no");
 	  return;
 	}