UBUNTU: SAUCE: drm/i915: Workaround for DP DPMS D3 on Dell monitor

UBUNTU: SAUCE: drm/i915: Workaround for DP DPMS D3 on Dell monitor

BugLink: https://launchpad.net/bugs/1723915
Dell Wyse 3040 box with Cherry Trail shows a blank monitor output
and other display issues with a certain Dell DP monitors (E-series).
The only reliable workaround so far is to skip DP DPMS D3 transition.

Based on the patch in opensuse created by Takashi Iwai <tiwai@suse.de>.

Signed-off-by: Wen-chien Jesse Sung <jesse.sung@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Marcelo Cerri <marcelo.cerri@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>