video: mxsfb: remove dotclk_delay from platform_data

There is no in-tree mxsfb users using mxsfb_platform_data dotclk_delay.
Let's remove it from mxsfb_platform_data to ease full device tree
adoption of mxsfb driver.  If later we have platform/board need to
configure this parameter, we can add it into device tree bindings.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

drivers/video/mxsfb.c

@@ -701,7 +701,6 @@ static int mxsfb_init_fbinfo(struct mxsfb_info *host)
 	var->accel_flags = 0;
 	var->vmode = FB_VMODE_NONINTERLACED;
 
-	host->dotclk_delay = pdata->dotclk_delay;
 	host->ld_intf_width = pdata->ld_intf_width;
 
 	/* Memory allocation for framebuffer */

include/linux/mxsfb.h

@@ -33,7 +33,6 @@ struct mxsfb_platform_data {
 
 	unsigned default_bpp;
 
-	unsigned dotclk_delay;	/* refer manual HW_LCDIF_VDCTRL4 register */
 	unsigned ld_intf_width;	/* refer STMLCDIF_* macros */
 	u32 sync;		/* sync mask, contains MXSFB specifics not
 				 * carried in fb_info->var.sync