Merge Linux 4.4.268 kernel

Changes in 4.4.268: (34 commits)
        net/sctp: fix race condition in sctp_destroy_sock
        Input: nspire-keypad - enable interrupts only when opened
        dmaengine: dw: Make it dependent to HAS_IOMEM
        ARM: dts: Fix moving mmc devices with aliases for omap4 & 5
        arc: kernel: Return -EFAULT if copy_to_user() fails
        neighbour: Disregard DEAD dst in neigh_update
        ARM: keystone: fix integer overflow warning
        ASoC: fsl_esai: Fix TDM slot setup for I2S mode
        net: ieee802154: stop dump llsec keys for monitors
        net: ieee802154: stop dump llsec devs for monitors
        net: ieee802154: forbid monitor for add llsec dev
        net: ieee802154: stop dump llsec devkeys for monitors
        net: ieee802154: forbid monitor for add llsec devkey
        net: ieee802154: stop dump llsec seclevels for monitors
        net: ieee802154: forbid monitor for add llsec seclevel
        pcnet32: Use pci_resource_len to validate PCI resource
        Input: i8042 - fix Pegatron C15B ID entry
        scsi: libsas: Reset num_scatter if libata marks qc as NODATA
        net: davicom: Fix regulator not turned off on failed probe
        i40e: fix the panic when running bpf in xdpdrv mode
        ARM: 9071/1: uprobes: Don't hook on thumb instructions
        net: hso: fix null-ptr-deref during tty device unregistration
        ext4: correct error label in ext4_rename()
        ARM: dts: Fix swapped mmc order for omap3
        s390/entry: save the caller of psw_idle
        xen-netback: Check for hotplug-status existence before watching
        cavium/liquidio: Fix duplicate argument
        ia64: fix discontig.c section mismatches
        ia64: tools: remove duplicate definition of ia64_mf() on ia64
        compiler.h: enable builtin overflow checkers and add fallback code
        overflow.h: Add allocation size calculation helpers
        x86/crash: Fix crash_setup_memmap_entries() out-of-bounds access
        net: hso: fix NULL-deref on disconnect regression
        Linux 4.4.268