Yet another update of Leap 15.1 kernel, mainly for the regression fix
from the previous submission (bsc#1174887)

- Revert pciehp patches that broke booting (bsc#1174887)
Delete:
patches.suse/PCI-pciehp-Fix-indefinite-wait-on-sysfs-requests.patch
patches.suse/PCI-pciehp-Support-interrupts-sent-from-D3hot.patch
Refresh:
patches.suse/0001-PCI-pciehp-Avoid-returning-prematurely-from-sysfs-re.patch
patches.suse/0001-PCI-pciehp-Do-not-handle-events-if-interrupts-are-ma.patch
patches.suse/0001-PCI-pciehp-Fix-hot-add-vs-powerfault-detection-order.patch
patches.suse/0001-PCI-pciehp-Unify-controller-and-slot-structs.patch
patches.suse/pci-pciehp-fix-msi-interrupt-race
- commit 1271054

- btrfs: qgroup: remove ASYNC_COMMIT mechanism in favor of
reserve retry-after-EDQUOT (bsc#1120163).
- Delete
patches.suse/0001-btrfs-qgroup-Make-qgroup-async-transaction-commit-mo.patch.
- commit f7f31ff

- btrfs: qgroup: try to flush qgroup space when we get -EDQUOT
(bsc#1120163).
- commit d99d6be

- btrfs: qgroup: allow to unreserve range without releasing
other ranges (bsc#1120163).
- Refresh
patches.suse/btrfs-qgroups-fix-rescan-worker-running-races.patch.
- commit 837b275

- btrfs: qgroup: fix data leak caused by race between writeback
and truncate (bsc#1172247).