Fix annoyingly awkward typo in drm_edid_load.c

Fix egregious typo in comment.

Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/10576.1464589598@turing-police.cc.vt.edu