drm: edid: HDMI 2.0 HF-VSDB block parsing

Adds parsing for HDMI 2.0 'HDMI Forum Vendor
Specific Data Block'. This block is present in
some HDMI 2.0 EDID's and gives information about
scrambling support, SCDC, 3D Views, and others.

Parsed parameters are stored in drm_connector
structure.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Carlos Palminha <palminha@synopsys.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
Patch-mainline: dri-devel @ 10 Aug 2016 16:29
Signed-off-by: Jin Li <jinl@codeaurora.org>
Change-Id: I018cfefea2fd3827d5f83c8e5717ebd95e497519