drm/i915/sdvo: If we have an EDID confirm it matches the mode of the connection

drm/i915/sdvo: If we have an EDID confirm it matches the mode of the connection

commit 139467433e50926d22338e9dc754feaaf94b9db0 upstream.

If we have an EDID for a digital panel, but we are probing a non-TMDS
connector then we know that this is a false detection, and vice versa.
This should reduce the number of bogus outputs on multi-function
adapters that report the same output on multiple connectors.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=34101
Reported-by: Sebastien Caty <sebastien.caty@mrnf.gouv.qc.ca>
Tested-by: Sebastien Caty <sebastien.caty@mrnf.gouv.qc.ca>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>