Regular kernel update for Leap 42.3, syncing with SLE12-SP3

- fix fragmentation series
- Update (use IP_INC_STATS_BH() rather than IP_INC_STATS()):
* patches.fixes/ip-discard-ipv4-datagrams-with-overlapping-segments.patch
* patches.fixes/ip-fail-fast-on-IP-defrag-errors.patch.
* Refresh patches.kabi/ip-drop-IPSTATS_MIB_REASM_OVERLAPS.patch.
- commit 5cfc4c6

- aio: hold an extra file reference over AIO read/write operations
(bsc#1116027).
- commit e3f1063

- Delete patches.rpmify/ppc64le-build-vmlinux.patch.
- commit 699fb09

- powerpc/boot: Request no dynamic linker for boot wrapper
(bsc#1070805).
- commit 3b35f95

- drm/fb-helper: Ignore the value of fb_var_screeninfo.pixclock (bsc#1106929)
- commit 89af5e6

- Refresh patches.rpmify/ppc64le-build-vmlinux.patch.
- commit c5890e6

- vfs: Avoid softlockups in drop_pagecache_sb() (bsc#1118505).
- commit 7cebba1

- Linux 4.4.170 (bnc#1012382).
- xhci: Don't prevent USB2 bus suspend in state check intended
for USB3 only (bnc#1012382).