ocfb: fix tgdel and tvdel timing parameters

According to the ocfb documentation:
Fix tgdel HW param should be left margin, not right.
Fix tvdel HW param should upper margin, not lower.

This seems to fix lock issues on certain monitors (tested on a
slightly customized IP, but the FPGA guy said that it should
be the same wrt this changes).
Signed-off-by: NAndrea Merello <andrea.merello@gmail.com>
Acked-by: NStefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/ocfb.c

@@ -123,11 +123,11 @@ static int ocfb_setupfb(struct ocfb_dev *fbdev)
 
 	/* Horizontal timings */
 	ocfb_writereg(fbdev, OCFB_HTIM, (var->hsync_len - 1) << 24 |
-		      (var->right_margin - 1) << 16 | (var->xres - 1));
+		      (var->left_margin - 1) << 16 | (var->xres - 1));
 
 	/* Vertical timings */
 	ocfb_writereg(fbdev, OCFB_VTIM, (var->vsync_len - 1) << 24 |
-		      (var->lower_margin - 1) << 16 | (var->yres - 1));
+		      (var->upper_margin - 1) << 16 | (var->yres - 1));
 
 	/* Total length of frame */
 	hlen = var->left_margin + var->right_margin + var->hsync_len +