Artful update to v4.13.8 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 v4.13.8 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 v4.13.8 stable release shall be applied:

USB: dummy-hcd: Fix deadlock caused by disconnect detection
MIPS: math-emu: Remove pr_err() calls from fpu_emu()
MIPS: bpf: Fix uninitialised target compiler error
mei: always use domain runtime pm callbacks.
dmaengine: edma: Align the memcpy acnt array size with the transfer
dmaengine: ti-dma-crossbar: Fix possible race condition with dma_inuse
NFS: Fix uninitialized rpc_wait_queue
nfs/filelayout: fix oops when freeing filelayout segment
HID: usbhid: fix out-of-bounds bug
crypto: skcipher - Fix crash on zero-length input
crypto: shash - Fix zero-length shash ahash digest crash
KVM: MMU: always terminate page walks at level 1
KVM: nVMX: fix guest CR4 loading when emulating L2 to L1 exit
usb: renesas_usbhs: Fix DMAC sequence for receiving zero-length packet
pinctrl/amd: Fix build dependency on pinmux code
iommu/amd: Finish TLB flush in amd_iommu_unmap()
device property: Track owner device of device property
Revert "vmalloc: back off when the current task is killed"
fs/mpage.c: fix mpage_writepage() for pages with buffers
ALSA: usb-audio: Kill stray URB at exiting
ALSA: seq: Fix use-after-free at creating a port
ALSA: seq: Fix copy_from_user() call inside lock
ALSA: caiaq: Fix stray URB at probe error path
ALSA: line6: Fix NULL dereference at podhd_disconnect()
ALSA: line6: Fix missing initialization before error path
ALSA: line6: Fix leftover URB at error-path during probe
drm/atomic: Unref duplicated drm_atomic_state in drm_atomic_helper_resume()
drm/i915/edp: Get the Panel Power Off timestamp after panel is off
drm/i915: Read timings from the correct transcoder in intel_crtc_mode_get()
drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel
drm/i915: Use crtc_state_is_legacy_gamma in intel_color_check
usb: gadget: configfs: Fix memory leak of interface directory data
usb: gadget: composite: Fix use-after-free in usb_composite_overwrite_options
PCI: aardvark: Move to struct pci_host_bridge IRQ mapping functions
Revert "PCI: tegra: Do not allocate MSI target memory"
direct-io: Prevent NULL pointer access in submit_page_section
fix unbalanced page refcounting in bio_map_user_iov
more bio_map_user_iov() leak fixes
bio_copy_user_iov(): don't ignore ->iov_offset
perf script: Add missing separator for "-F ip,brstack" (and brstackoff)
genirq/cpuhotplug: Enforce affinity setting on startup of managed irqs
genirq/cpuhotplug: Add sanity check for effective affinity mask
USB: serial: ftdi_sio: add id for Cypress WICED dev board
USB: serial: cp210x: fix partnum regression
USB: serial: cp210x: add support for ELV TFD500
USB: serial: option: add support for TP-Link LTE module
USB: serial: qcserial: add Dell DW5818, DW5819
USB: serial: console: fix use-after-free on disconnect
USB: serial: console: fix use-after-free after failed setup
RAS/CEC: Use the right length for "cec_disable"
x86/microcode: Do the family check first
x86/alternatives: Fix alt_max_short macro to really be a max()
KVM: nVMX: update last_nonleaf_level when initializing nested EPT
Linux 4.13.8