gdb: remove TYPE_RANGE_DATA macro

Remove it in favor of using type::bounds directly.

gdb/ChangeLog:

	* gdbtypes.h (TYPE_RANGE_DATA): Remove.  Update callers to use
	the type::bounds method directly.

Change-Id: Id4fab22af0a94cbf505f78b01b3ee5b3d682fba2

gdb/ada-lang.c

@@ -2250,7 +2250,7 @@ has_negatives (struct type *type)
     case TYPE_CODE_INT:
       return !TYPE_UNSIGNED (type);
     case TYPE_CODE_RANGE:
-      return TYPE_LOW_BOUND (type) - TYPE_RANGE_DATA (type)->bias < 0;
+      return TYPE_LOW_BOUND (type) - type->bounds ()->bias < 0;
     }
 }