Merge Linux 4.4.176 kernel

Changes in 4.4.176: (21 commits)
        net: fix IPv6 prefix route residue
        vsock: cope with memory allocation failure at socket creation time
        hwmon: (lm80) Fix missing unlock on error in set_fan_div()
        net: Fix for_each_netdev_feature on Big endian
        sky2: Increase D3 delay again
        net: Add header for usage of fls64()
        tcp: tcp_v4_err() should be more careful
        net: Do not allocate page fragments that are not skb aligned
        tcp: clear icsk_backoff in tcp_write_queue_purge()
        vxlan: test dev->flags & IFF_UP before calling netif_rx()
        net: stmmac: Fix a race in EEE enable callback
        net: ipv4: use a dedicated counter for icmp_v4 redirect packets
        x86: livepatch: Treat R_X86_64_PLT32 as R_X86_64_PC32
        kvm: fix kvm_ioctl_create_device() reference counting (CVE-2019-6974)
        mfd: as3722: Handle interrupts on suspend
        mfd: as3722: Mark PM functions as __maybe_unused
        net/x25: do not hold the cpu too long in x25_new_lci()
        mISDN: fix a race in dev_expire_timer()
        ax25: fix possible use-after-free
        KVM: VMX: Fix x2apic check in vmx_msr_bitmap_mode()
        Linux 4.4.176