UBUNTU: SAUCE: pci/nvme: prevent WDC PC SN720 NVMe from entering D3 and being disabled

UBUNTU: SAUCE: pci/nvme: prevent WDC PC SN720 NVMe from entering D3 and being disabled

BugLink: https://bugs.launchpad.net/bugs/1805775
It leads to the power consumption increases 3.41W during s2idle, while it
consumes much less idle if forbidding put WDC NVMe to D3 and before
entering S2Idle.

Windows doesn't put NVMe to D3 in Modern Standby, and uses its own APST
feature to do the power management. To leverage its APST feature during
s2idle, we can't disable nvme device while suspending, too.

So, here is what we do to the driver:
- Prevent nvme from entering D3,
- Prevent nvme from being disabled when suspending.

Signed-off-by: AceLan Kao <acelan.kao at canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Kai Heng Feng <kai.heng.feng@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>