Artful update to v4.11.8 stable release

SRU Justification

    Impact:
       The upstream process for stable tree updates is quite similar
       in scope to the Ubuntu SRU process, e.g., each patch has to
       demonstrably fix a bug, and each patch is vetted by upstream
       by originating either directly from a mainline/stable Linux tree or
       a minimally backported form of that patch. The v4.11.8 upstream stable
       patch set is now available. It should be included in the Ubuntu
       kernel as well.

       git://git.kernel.org/

    TEST CASE: TBD

       The following patches from the v4.11.8 stable release shall be applied:

clk: sunxi-ng: a31: Correct lcd1-ch1 clock register offset
clk: sunxi-ng: v3s: Fix usb otg device reset bit
clk: sunxi-ng: sun5i: Fix ahb_bist_clk definition
xen/blkback: fix disconnect while I/Os in flight
xen-blkback: don't leak stack data via response ring
ALSA: firewire-lib: Fix stall of process context at packet error
ALSA: pcm: Don't treat NULL chmap as a fatal error
ALSA: hda - Add Coffelake PCI ID
ALSA: hda - Apply quirks to Broxton-T, too
fs/exec.c: account for argv/envp pointers
powerpc/perf: Fix oops when kthread execs user process
autofs: sanity check status reported with AUTOFS_DEV_IOCTL_FAIL
fs/dax.c: fix inefficiency in dax_writeback_mapping_range()
lib/cmdline.c: fix get_options() overflow while parsing ranges
perf/x86/intel: Add 1G DTLB load/store miss support for SKL
perf probe: Fix probe definition for inlined functions
KVM: x86: fix singlestepping over syscall
KVM: MIPS: Fix maybe-uninitialized build failure
KVM: s390: gaccess: fix real-space designation asce handling for gmap shadows
KVM: PPC: Book3S HV: Cope with host using large decrementer mode
KVM: PPC: Book3S HV: Preserve userspace HTM state properly
KVM: PPC: Book3S HV: Ignore timebase offset on POWER9 DD1
KVM: PPC: Book3S HV: Context-switch EBB registers properly
KVM: PPC: Book3S HV: Restore critical SPRs to host values on guest exit
KVM: PPC: Book3S HV: Save/restore host values of debug registers
CIFS: Improve readdir verbosity
CIFS: Fix some return values in case of error in 'crypt_message'
cxgb4: notify uP to route ctrlq compl to rdma rspq
HID: Add quirk for Dell PIXART OEM mouse
random: silence compiler warnings and fix race
signal: Only reschedule timers on signals timers have sent
powerpc/kprobes: Pause function_graph tracing during jprobes handling
powerpc/64s: Handle data breakpoints in Radix mode
Input: i8042 - add Fujitsu Lifebook AH544 to notimeout list
brcmfmac: add parameter to pass error code in firmware callback
brcmfmac: use firmware callback upon failure to load
brcmfmac: unbind all devices upon failure in firmware callback
time: Fix clock->read(clock) race around clocksource changes
time: Fix CLOCK_MONOTONIC_RAW sub-nanosecond accounting
arm64/vdso: Fix nsec handling for CLOCK_MONOTONIC_RAW
target: Fix kref->refcount underflow in transport_cmd_finish_abort
iscsi-target: Fix delayed logout processing greater than SECONDS_FOR_LOGOUT_COMP
iscsi-target: Reject immediate data underflow larger than SCSI transfer length
drm/radeon: add a PX quirk for another K53TK variant
drm/radeon: add a quirk for Toshiba Satellite L20-183
drm/amdgpu/atom: fix ps allocation size for EnableDispPowerGating
drm/amdgpu: adjust default display clock
drm/amdgpu: add Polaris12 DID
ACPI / scan: Apply default enumeration to devices with ACPI drivers
ACPI / scan: Fix enumeration for special SPI and I2C devices
rxrpc: Fix several cases where a padded len isn't checked in ticket decode
drm: Fix GETCONNECTOR regression
usb: gadget: f_fs: avoid out of bounds access on comp_desc
spi: double time out tolerance
net: phy: fix marvell phy status reading
brcmfmac: fix uninitialized warning in brcmf_usb_probe_phase2()
Linux 4.11.8

The following patches from v4.11.8 had already been applied to artful:

netfilter: xtables: zero padding in data_to_user
netfilter: xtables: fix build failure from COMPAT_XT_ALIGN outside CONFIG_COMPAT