ANDROID: fix up lt9611 driver due to recent drm upstream changes

This fixes up the drivers/gpu/drm/bridge/lontium-lt9611.c to build
properly, should still work just as well as no logic changed, but would
be good if someone verified this...

Bug: 146449535
Cc: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I89984053acccff38d3156d24ec28fc165af50013