sunxi-disp: Fix lcd controller timing programming for interlaced modes

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
sunxi-hdmi: edid: introduce HT and VT helper variables

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
sunxi-hdmi: Adjust vertical total in interlaced mode with +1 if needed

The VT we get from EDID is the real VT / 2 *rounded down*, so we need to
have either VT * 2 or VT * 2 + 1, add some magic to figure out which one
we need.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>