[Matrix] Group matrix diagnostics together (NFC).

Author: fhahn

clang/include/clang/Basic/DiagnosticSemaKinds.td

@@ -10789,35 +10789,28 @@ def err_matrix_separate_incomplete_index: Error<
   "matrix row and column subscripts cannot be separated by any expression">;
 def err_matrix_subscript_comma: Error<
   "comma expressions are not allowed as indices in matrix subscript expressions">;
-
-def warn_mismatched_import : Warning<
-  "import %select{module|name}0 (%1) does not match the import %select{module|name}0 (%2) of the "
-  "previous declaration">,
-  InGroup<IgnoredAttributes>;
-def warn_import_on_definition : Warning<
-  "import %select{module|name}0 cannot be applied to a function with a definition">,
-  InGroup<IgnoredAttributes>;
-
 def err_builtin_matrix_arg: Error<"first argument must be a matrix">;
-
 def err_builtin_matrix_scalar_unsigned_arg: Error<
   "%0 argument must be a constant unsigned integer expression">;
-
 def err_builtin_matrix_pointer_arg: Error<
   "%0 argument must be a pointer to a valid matrix element type">;
-
 def err_builtin_matrix_pointer_arg_mismatch: Error<
   "the pointee of the second argument must match the element type of the first argument (%0 != %1)">;
-
 def err_builtin_matrix_store_to_const: Error<
   "cannot store matrix to read-only pointer">;
-
 def err_builtin_matrix_stride_too_small: Error<
   "stride must be greater or equal to the number of rows">;
-
 def err_builtin_matrix_invalid_dimension: Error<
   "%0 dimension is outside the allowed range [1, %1]">;
 
+def warn_mismatched_import : Warning<
+  "import %select{module|name}0 (%1) does not match the import %select{module|name}0 (%2) of the "
+  "previous declaration">,
+  InGroup<IgnoredAttributes>;
+def warn_import_on_definition : Warning<
+  "import %select{module|name}0 cannot be applied to a function with a definition">,
+  InGroup<IgnoredAttributes>;
+
 def err_preserve_field_info_not_field : Error<
   "__builtin_preserve_field_info argument %0 not a field access">;
 def err_preserve_field_info_not_const: Error<