drm/i915: fix mask bits setting

eDP is exclusive connector too, and add missing crtc_mask
setting for TV.

This fixes

	http://bugzilla.kernel.org/show_bug.cgi?id=14139

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Reported-and-tested-by: Carlos R. Mafra <crmafra2@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>