OMAP: omap_device: ensure hwmod tracks attached omap_device pointer

The omap_hwmod struct has a field to track the omap_device that is
attached to it, but it was not being assigned.  Fix by assigning omap_device
pointer when omap_device is built.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
[paul@pwsan.com: use an array index rather than pointer arithmetic]
Signed-off-by: Paul Walmsley <paul@pwsan.com>

arch/arm/plat-omap/omap_device.c

@@ -359,7 +359,7 @@ struct omap_device *omap_device_build_ss(const char *pdev_name, int pdev_id,
 	struct omap_device *od;
 	char *pdev_name2;
 	struct resource *res = NULL;
-	int res_count;
+	int i, res_count;
 	struct omap_hwmod **hwmods;
 
 	if (!ohs || oh_cnt == 0 || !pdev_name)
@@ -416,6 +416,9 @@ struct omap_device *omap_device_build_ss(const char *pdev_name, int pdev_id,
 	else
 		ret = omap_device_register(od);
 
+	for (i = 0; i < oh_cnt; i++)
+		hwmods[i]->od = od;
+
 	if (ret)
 		goto odbs_exit4;