Xenial update: 4.4.214 upstream stable release

Skipped:
 * Revert "ovl: modify ovl_permission() to do checks on two inodes"

resolved some minor conflicts with:
 * of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc
 * KVM: x86: Protect kvm_hv_msr_[get|set]_crash_data() from Spectre-v1/L1TF attacks
 * libertas: don't exit from lbs_ibss_join_existing() with RCU read lock held
 * dm: fix potential for q->make_request_fn NULL pointer

This bug was fixed in the package linux - 4.4.0-177.207

---------------
linux (4.4.0-177.207) xenial; urgency=medium

  * xenial/linux: 4.4.0-177.207 -proposed tracker (LP: #1867243)

  * Packaging resync (LP: #1786013)
    - [Packaging] resync getabis
    - [Packaging] update helper scripts

  * Xenial update: 4.4.214 upstream stable release (LP: #1864775)
    - media: iguanair: fix endpoint sanity check
    - x86/cpu: Update cached HLE state on write to TSX_CTRL_CPUID_CLEAR
    - sparc32: fix struct ipc64_perm type definition
    - ASoC: qcom: Fix of-node refcount unbalance to link->codec_of_node
    - cls_rsvp: fix rsvp_policy
    - net: hsr: fix possible NULL deref in hsr_handle_frame()
    - net_sched: fix an OOB access in cls_tcindex
    - tcp: clear tp->total_retrans in tcp_disconnect()
    - tcp: clear tp->segs_{in|out} in tcp_disconnect()
    - media: uvcvideo: Avoid cyclic entity chains due to malformed USB descriptors
    - mfd: dln2: More sanity checking for endpoints
    - brcmfmac: Fix memory leak in brcmf_usbdev_qinit
    - usb: gadget: legacy: set max_speed to super-speed
    - usb: gadget: f_ncm: Use atomic_t to track in-flight request
    - usb: gadget: f_ecm: Use atomic_t to track in-flight request
    - ALSA: dummy: Fix PCM format loop in proc output
    - lib/test_kasan.c: fix memory leak in kmalloc_oob_krealloc_more()
    - powerpc/pseries: Advance pfn if section is not present in lmb_is_removable()
    - mmc: spi: Toggle SPI polarity, do not hardcode it
    - PCI: keystone: Fix link training retries initiation
    - crypto: api - Check spawn->alg under lock in crypto_drop_spawn
    - scsi: qla2xxx: Fix mtcp dump collection failure
    - power: supply: ltc2941-battery-gauge: fix use-after-free
    - of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc
    - dm space map common: fix to ensure new block isn't already in use
    - crypto: pcrypt - Do not clear MAY_SLEEP flag in original request
    - crypto: api - Fix race condition in crypto_spawn_alg
    - crypto: picoxcell - adjust the position of tasklet_init and fix missed
      tasklet_kill
    - btrfs: set trans->drity in btrfs_commit_transaction
    - ARM: tegra: Enable PLLP bypass during Tegra124 LP1
    - mwifiex: fix unbalanced locking in mwifiex_process_country_ie()
    - sunrpc: expiry_time should be seconds not timeval
    - KVM: x86: Refactor prefix decoding to prevent Spectre-v1/L1TF attacks
    - KVM: x86: Protect DR-based index computations from Spectre-v1/L1TF attacks
    - KVM: x86: Protect kvm_hv_msr_[get|set]_crash_data() from Spectre-v1/L1TF
      attacks
    - KVM: x86: Protect ioapic_write_indirect() from Spectre-v1/L1TF attacks
    - KVM: x86: Protect MSR-based index computations in pmu.h from Spectre-v1/L1TF
      attacks
    - KVM: x86: Protect ioapic_read_indirect() from Spectre-v1/L1TF attacks
    - KVM: x86: Protect MSR-based index computations from Spectre-v1/L1TF attacks
      in x86.c
    - KVM: x86: Protect x86_decode_insn from Spectre-v1/L1TF attacks
    - KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit()
      from Spectre-v1/L1TF attacks
    - KVM: PPC: Book3S HV: Uninit vCPU if vcore creation fails
    - KVM:...