4.2-stable patches

4.2-stable patches

added patches:
	drm-dp-mst-drop-cancel-work-sync-in-the-mstb-destroy-path-v2.patch
	drm-dp-mst-fixup-handling-hotplug-on-port-removal.patch
	drm-radeon-restore-lcd-backlight-level-on-resume-r5xx.patch
	usb-whiteheat-fix-potential-null-deref-at-probe.patch
	usb-xhci-add-support-for-urb_zero_packet-to-bulk-sg-transfers.patch
	usb-xhci-clear-xhci_state_dying-on-start.patch
	usb-xhci-exit-early-in-xhci_setup_device-if-we-re-halted-or-dying.patch
	usb-xhci-lock-mutex-on-xhci_stop.patch
	usb-xhci-stop-everything-on-the-first-call-to-xhci_stop.patch
	xhci-change-xhci-1.0-only-restrictions-to-support-xhci-1.1.patch
	xhci-give-command-abortion-one-more-chance-before-killing-xhci.patch
	xhci-init-command-timeout-timer-earlier-to-avoid-deleting-it-uninitialized.patch
	xhci-move-xhci_pme_quirk-behind-ifdef-config_pm.patch