drm/edid/firmware: Add built-in edid/1280x720.bin firmware

drm/edid/firmware: Add built-in edid/1280x720.bin firmware

Add built-in edid/1280x720.bin firmware to drm_edid_loader.
The mode is generated from tools/edid/ with below edid data:
   /* 1280x720: Modeline "1280x720" 74.50 1280 1344 1472 1664 720 723 728 748 -hsync +vsync */
   #define HSYNC_POL 1
   #define VSYNC_POL 1
   #define YPULSE (63+5)
   #define XPULSE 128
   #define YPIX 720
   #define XPIX 1280
   #define VFREQ 60
   #define DPI 96
   #define CLOCK 74500
   #define VERSION 1
   #define REVISION 3
   #define XOFFSET 64
   #define YOFFSET (63+3)
   #define XY_RATIO XY_RATIO_16_9
   #define YBLANK 28
   #define XBLANK 384
   #define TIMING_NAME "1280x720"
   #include "edid.S"

Change-Id: Idfc610102a35494ee54aca06af411cfd9d737b0f
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>