grlib: Move source files

Update #3678.

bsps/shared/grlib/drvmgr/get_resarray_count.c

@@ -0,0 +1,20 @@
+/*  Common driver configuration routines.
+ *
+ *  COPYRIGHT (c) 2015.
+ *  Cobham Gaisler.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <stdlib.h>
+#include <grlib/bspcommon.h>
+
+int get_resarray_count(struct drvmgr_bus_res **array)
+{
+	int i = 0;
+	while (array[i] != NULL)
+		i++;
+	return i;
+}