HSA: omp-grid.c – access proper clause code

	* omp-grid.c (grid_eliminate_combined_simd_part): Use
	OMP_CLAUSE_CODE to access the omp clause code.

diff --git a/gcc/omp-grid.c b/gcc/omp-grid.c
index b98e45de6a0..ba635fd3ea2 100644
--- a/gcc/omp-grid.c
+++ b/gcc/omp-grid.c
@@ -1065,7 +1065,7 @@ grid_eliminate_combined_simd_part (gomp_for *parloop)
   while (*pc)
     {
       tree c = *pc;
-      switch (TREE_CODE (c))
+      switch (OMP_CLAUSE_CODE (c))
 	{
 	case OMP_CLAUSE_LINEAR:
 	  {