3.4-stable patches

3.4-stable patches

added patches:
	acpi-memhotplug-fix-a-stale-pointer-in-error-path.patch
	ata-fix-dvd-not-dectected-at-some-platform-with-wellsburg-pch.patch
	btrfs-fix-lock-leak-when-resuming-snapshot-deletion.patch
	btrfs-re-add-root-to-dead-root-list-if-we-stop-dropping-it.patch
	dm-verity-fix-inability-to-use-a-few-specific-devices-sizes.patch
	libata-make-it-clear-that-sata_inic162x-is-experimental.patch
	powerpc-modules-module-crc-relocation-fix-causes-perf-issues.patch
	scsi-qla2xxx-properly-set-the-tagging-for-commands.patch
	scsi-sd-fix-crash-when-ua-received-on-dif-enabled-device.patch
	staging-comedi-comedi_cancel-ioctl-should-wake-up-read-write.patch
	tracing-fix-irqs-off-tag-display-in-syscall-tracing.patch
	usb-clear-both-buffers-when-clearing-a-control-transfer-tt-buffer.patch
	usb-dwc3-fix-wrong-bit-mask-in-dwc3_event_type.patch
	usb-dwc3-gadget-don-t-prevent-gadget-from-being-probed-if-we-fail.patch
	usb-host-xhci-enable-xhci_spurious_success-for-all-controllers-with-xhci-1.0.patch
	usb-misc-add-manhattan-hi-speed-usb-dvi-converter-to-sisusbvga.patch
	usb-ti_usb_3410_5052-fix-dynamic-id-matching.patch
	xen-blkback-check-device-permissions-before-allowing-op_discard.patch
	xhci-avoid-null-pointer-deref-when-host-dies.patch
	xhci-fix-null-pointer-dereference-on-ring_doorbell_for_active_rings.patch