4.19-stable patches

4.19-stable patches

added patches:
	gtp-fix-bad-unlock-balance-in-gtp_encap_enable_socket.patch
	macvlan-do-not-assume-mac_header-is-set-in-macvlan_broadcast.patch
	mlxsw-spectrum_qdisc-ignore-grafting-of-invisible-fifo.patch
	net-dsa-mv88e6xxx-preserve-priority-when-setting-cpu-port.patch
	net-sch_prio-when-ungrafting-replace-with-fifo.patch
	net-stmmac-dwmac-sun8i-allow-all-rgmii-modes.patch
	net-stmmac-dwmac-sunxi-allow-all-rgmii-modes.patch
	net-usb-lan78xx-fix-possible-skb-leak.patch
	pkt_sched-fq-do-not-accept-silly-tca_fq_quantum.patch
	sch_cake-avoid-possible-divide-by-zero-in-cake_enqueue.patch
	sctp-free-cmd-obj.chunk-for-the-unprocessed-sctp_cmd_reply.patch
	tcp-fix-old-stuff-d-sack-causing-sack-to-be-treated-as-d-sack.patch
	vlan-fix-memory-leak-in-vlan_dev_set_egress_priority.patch
	vlan-vlan_changelink-should-propagate-errors.patch
	vxlan-fix-tos-value-before-xmit.patch