c-family: Add some more ARRAY_SIZE uses

These two spots were just non-standard, because they divided
sizeof (omp_pragmas_simd) by sizeof (*omp_pragmas) and not
the expected sizeof (*omp_pragmas_simd) and so weren't converted
into ARRAY_SIZE.  Both of the latter sizes are the same though,
as both arrays have the same type, so this patch doesn't change
anything but readability.

2024-08-09  Jakub Jelinek  <jakub@redhat.com>

	* c-pragma.cc (c_pp_lookup_pragma): Use ARRAY_SIZE in
	n_omp_pragmas_simd initializer.
	(init_pragmas): Likewise.

gcc/c-family/c-pragma.cc

@@ -1565,8 +1565,7 @@ c_pp_lookup_pragma (unsigned int id, const char **space, const char **name)
 {
   const int n_oacc_pragmas = ARRAY_SIZE (oacc_pragmas);
   const int n_omp_pragmas = ARRAY_SIZE (omp_pragmas);
-  const int n_omp_pragmas_simd = sizeof (omp_pragmas_simd)
-				 / sizeof (*omp_pragmas);
+  const int n_omp_pragmas_simd = ARRAY_SIZE (omp_pragmas_simd);
   int i;
 
   for (i = 0; i < n_oacc_pragmas; ++i)
@@ -1807,8 +1806,7 @@ init_pragma (void)
 	}
       if (flag_openmp || flag_openmp_simd)
 	{
-	  const int n_omp_pragmas_simd
-	    = sizeof (omp_pragmas_simd) / sizeof (*omp_pragmas);
+	  const int n_omp_pragmas_simd = ARRAY_SIZE (omp_pragmas_simd);
 	  int i;
 
 	  for (i = 0; i < n_omp_pragmas_simd; ++i)