VESA 1024x768 results in much more accurate timings.
Based on the patch from Soeren Moch for the tbs2910 board.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
                .refresh        = 60,
                .xres           = 1024,
                .yres           = 768,
-               .pixclock       = 15385,
-               .left_margin    = 220,
-               .right_margin   = 40,
-               .upper_margin   = 21,
-               .lower_margin   = 7,
-               .hsync_len      = 60,
-               .vsync_len      = 10,
+               .pixclock       = 15384,
+               .left_margin    = 160,
+               .right_margin   = 24,
+               .upper_margin   = 29,
+               .lower_margin   = 3,
+               .hsync_len      = 136,
+               .vsync_len      = 6,
                .sync           = FB_SYNC_EXT,
                .vmode          = FB_VMODE_NONINTERLACED
 } }, {
                .refresh        = 60,
                .xres           = 1024,
                .yres           = 768,
-               .pixclock       = 15385,
-               .left_margin    = 220,
-               .right_margin   = 40,
-               .upper_margin   = 21,
-               .lower_margin   = 7,
-               .hsync_len      = 60,
-               .vsync_len      = 10,
+               .pixclock       = 15384,
+               .left_margin    = 160,
+               .right_margin   = 24,
+               .upper_margin   = 29,
+               .lower_margin   = 3,
+               .hsync_len      = 136,
+               .vsync_len      = 6,
                .sync           = FB_SYNC_EXT,
                .vmode          = FB_VMODE_NONINTERLACED
 } }, {