Merge Linux 4.4.250 kernel

Changes in 4.4.250: (21 commits)
        ALSA: hda/ca0132 - Fix work handling in delayed HP detection
        ALSA: usb-audio: simplify set_sync_ep_implicit_fb_quirk
        ALSA: usb-audio: fix sync-ep altsetting sanity check
        ALSA: hda/realtek - Support Dell headset mode for ALC3271
        ALSA: hda - Fix a wrong FIXUP for alc289 on Dell machines
        ALSA: hda/realtek - Dell headphone has noise on unmute for ALC236
        s390/dasd: fix hanging device offline processing
        USB: serial: digi_acceleport: fix write-wakeup deadlocks
        uapi: move constants from <linux/kernel.h> to <linux/const.h>
        of: fix linker-section match-table corruption
        reiserfs: add check for an invalid ih_entry_count
        misc: vmw_vmci: fix kernel info-leak by initializing dbells in vmci_ctx_get_chkpt_doorbells()
        media: gp8psk: initialize stats at power control logic
        ALSA: seq: Use bool for snd_seq_queue internal flags
        module: set MODULE_STATE_GOING state when a module fails to load
        quota: Don't overflow quota file offsets
        powerpc: sysdev: add missing iounmap() on error in mpic_msgr_probe()
        module: delay kobject uevent until after module init call
        iio:magnetometer:mag3110: Fix alignment and data leak issues.
        mwifiex: Fix possible buffer overflows in mwifiex_cmd_802_11_ad_hoc_start
        Linux 4.4.250