video: udlfb: Do not name private data 'dev'

Variable 'dev' is usually used for 'struct device'. Therefore
rename driver private data to dlfb to avoid confusion once
driver will be using dev_*() logging functions.
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Cc: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

include/video/udlfb.h

@@ -19,7 +19,7 @@ struct dloarea {
 
 struct urb_node {
 	struct list_head entry;
-	struct dlfb_data *dev;
+	struct dlfb_data *dlfb;
 	struct delayed_work release_urb_work;
 	struct urb *urb;
 };