UBUNTU: SAUCE: PCI: Support hibmc VGA cards behind a misbehaving HiSilicon bridge

UBUNTU: SAUCE: PCI: Support hibmc VGA cards behind a misbehaving HiSilicon bridge

BugLink: https://bugs.launchpad.net/bugs/1698706
The HiSilicon D05 board has some PCI bridges (PCI ID 19e5:1610) that
are not spec-compliant: the VGA Enable bit is set to 0 in hardware
and writes do not change it.

This stops VGA arbitrartion from marking a VGA card behind the bridge
as a boot device, and therefore breaks Xorg auto-configuration.

The hibmc VGA card (PCI ID 19e5:1711) is known to work when behind
these bridges.

Provide a quirk so that this combination of bridge and card is eligible
to be the default VGA card.

This fixes Xorg auto-detection.

Cc: Xinliang Liu <z.liuxinliang@hisilicon.com>
Cc: Rongrong Zou <zourongrong@gmail.com>
Signed-off-by: Daniel Axtens <daniel.axtens@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
[saf: Adjusted context for 4.12]
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>