4.4-stable patches

4.4-stable patches

added patches:
	acpi-apei-fix-nmi-notification-handling.patch
	blk-mq-always-schedule-hctx-next_cpu.patch
	block-cfq_cpd_alloc-should-use-gfp.patch
	btrfs-fix-error-handling-when-run_delayed_extent_op-fails.patch
	btrfs-fix-locking-when-we-put-back-a-delayed-ref-that-s-too-new.patch
	bus-vexpress-config-fix-device-reference-leak.patch
	cpufreq-powernv-disable-preemption-while-checking-cpu-throttling-state.patch
	drm-radeon-drop-verde-dpm-quirks.patch
	nfs-fix-a-performance-regression-in-readdir.patch
	nfsv4.1-nfs4_fl_prepare_ds-must-be-careful-about-reporting-success.patch
	pinctrl-meson-fix-gpio-request-disabling-other-modes.patch
	pnfs-fix-race-in-pnfs_wait_on_layoutreturn.patch
	powerpc-ibmebus-fix-device-reference-leaks-in-sysfs-interface.patch
	powerpc-ibmebus-fix-further-device-reference-leaks.patch
	sysctl-drop-reference-added-by-grab_header-in-proc_sys_readdir.patch
	sysrq-attach-sysrq-handler-correctly-for-32-bit-kernel.patch
	tty-serial-atmel_serial-bug-stop-dma-from-transmitting-in-stop_tx.patch
	usb-serial-ch341-fix-modem-control-and-b0-handling.patch
	usb-serial-ch341-fix-resume-after-reset.patch
	x86-cpu-fix-bootup-crashes-by-sanitizing-the-argument-of-the-clearcpuid-command-line-option.patch