4.2-stable patches

4.2-stable patches

added patches:
	block-don-t-release-bdi-while-request_queue-has-live-references.patch
	clkdev-fix-clk_add_alias-with-a-null-alias-device-name.patch
	dm-btree-fix-leak-of-bufio-backed-block-in-btree_split_beneath-error-path.patch
	dm-btree-remove-fix-a-bug-when-rebalancing-nodes-after-removal.patch
	dm-cache-the-clean_shutdown-flag-was-not-being-set.patch
	fbcon-initialize-blink-interval-before-calling-fb_set_par.patch
	i2c-mv64xxx-really-allow-i2c-offloading.patch
	module-fix-locking-in-symbol_put_addr.patch
	nvme-fix-32-bit-build-warning.patch
	revert-serial-8250_dma-don-t-bother-dma-with-small-transfers.patch
	usb-qcserial-add-sierra-wireless-mc74xx-em74xx.patch
	xen-blkfront-check-for-null-drvdata-in-blkback_changed-xenbusstateclosing.patch
	xhci-add-spurious-wakeup-quirk-for-lynxpoint-lp-controllers.patch
	xhci-handle-no-ping-response-error-properly.patch