kernel: update kernel 4.4 to version 4.4.8

include/kernel-version.mk

...linux/ar71xx/patches-4.4/910-unaligned_access_hacks.patch

...9-hid-Reduce-default-mouse-polling-interval-to-60Hz.patch

...net-fix-bridge-multicast-packet-checksum-validation.patch

...pf-add-skb_postpush_rcsum-and-fix-dev_forward_skb-o.patch

...et/linux/generic/patches-4.4/630-packet_socket_type.patch

...t/linux/generic/patches-4.4/642-bridge_port_isolate.patch

...generic/patches-4.4/645-bridge_multicast_to_unicast.patch

target/linux/generic/patches-4.4/655-increase_skb_pad.patch

.../generic/patches-4.4/656-skb_reduce_truesize-helper.patch

...atches-4.4/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch

target/linux/generic/patches-4.4/721-phy_packets.patch

target/linux/generic/patches-4.4/903-debloat_direct_io.patch

...lantiq/patches-4.4/0001-MIPS-lantiq-add-pcie-driver.patch