drm/intel_dsi_vbt: Remove duplicate header

Remove video/mipi_display.h which is included more than once
Signed-off-by: Brajeswar Ghosh <brajeswar.linux@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181225133055.GA2628@hp-pavilion-15-notebook-pc-brajeswar

drivers/gpu/drm/i915/intel_dsi_vbt.c

@@ -32,7 +32,6 @@
 #include <linux/slab.h>
 #include <video/mipi_display.h>
 #include <asm/intel-mid.h>
-#include <video/mipi_display.h>
 #include "i915_drv.h"
 #include "intel_drv.h"
 #include "intel_dsi.h"