Merge Linux 4.4.246 kernel

Changes in 4.4.246: (39 commits)
        ah6: fix error return code in ah6_input()
        atm: nicstar: Unmap DMA on send error
        net: b44: fix error return code in b44_init_one()
        net: bridge: add missing counters to ndo_get_stats64 callback
        netlabel: fix our progress tracking in netlbl_unlabel_staticlist()
        netlabel: fix an uninitialized warning in netlbl_unlabel_staticlist()
        net/mlx4_core: Fix init_hca fields offset
        net: x25: Increase refcnt of "struct x25_neigh" in x25_rx_call_request
        qlcnic: fix error return code in qlcnic_83xx_restart_hw()
        sctp: change to hold/put transport for proto_unreach_timer
        net: usb: qmi_wwan: Set DTR quirk for MR400
        net: Have netpoll bring-up DSA management interface
        pinctrl: rockchip: enable gpio pclk for rockchip_gpio_to_irq
        arm64: psci: Avoid printing in cpu_psci_cpu_die()
        MIPS: Fix BUILD_ROLLBACK_PROLOGUE for microMIPS
        Input: adxl34x - clean up a data type in adxl34x_probe()
        arm: dts: imx6qdl-udoo: fix rgmii phy-mode for ksz9031 phy
        ARM: dts: imx50-evk: Fix the chip select 1 IOMUX
        perf lock: Don't free "lock_seq_stat" if read_count isn't zero
        can: dev: can_restart(): post buffer from the right context
        can: peak_usb: fix potential integer overflow on shift of a int
        can: m_can: m_can_handle_state_change(): fix state change
        MIPS: Alchemy: Fix memleak in alchemy_clk_setup_cpu
        regulator: ti-abb: Fix array out of bound read access on the first transition
        libfs: fix error cast of negative value in simple_attr_write()
        powerpc/uaccess-flush: fix corenet64_smp_defconfig build
        ALSA: ctl: fix error path at adding user-defined element set
        ALSA: mixart: Fix mutex deadlock
        tty: serial: imx: keep console clocks always on
        efivarfs: fix memory leak in efivarfs_create()
        ext4: fix bogus warning in ext4_update_dx_flag()
        xtensa: disable preemption around cache alias management calls
        mac80211: minstrel: remove deferred sampling code
        mac80211: minstrel: fix tx status processing corner case
        mac80211: allow driver to prevent two stations w/ same address
        mac80211: free sta in sta_info_insert_finish() on errors
        s390/cpum_sf.c: fix file permission for cpum_sfb_size
        x86/microcode/intel: Check patch signature before saving microcode for early loading
        Linux 4.4.246

Conflicts:
	net/core/netpoll.c