Merge 4.9.255 into android-4.9-q

Changes in 4.9.255
	ACPI: sysfs: Prefer "compatible" modalias
	wext: fix NULL-ptr-dereference with cfg80211's lack of commit()
	net: usb: qmi_wwan: added support for Thales Cinterion PLSx3 modem family
	y2038: futex: Move compat implementation into futex.c
	futex: Move futex exit handling into futex code
	futex: Replace PF_EXITPIDONE with a state
	exit/exec: Seperate mm_release()
	futex: Split futex_mm_release() for exit/exec
	futex: Set task::futex_state to DEAD right after handling futex exit
	futex: Mark the begin of futex exit explicitly
	futex: Sanitize exit state handling
	futex: Provide state handling for exec() as well
	futex: Add mutex around futex exit
	futex: Provide distinct return value when owner is exiting
	futex: Prevent exit livelock
	KVM: x86/pmu: Fix HW_REF_CPU_CYCLES event pseudo-encoding in intel_arch_events[]
	KVM: x86: get smi pending status correctly
	leds: trigger: fix potential deadlock with libata
	mt7601u: fix kernel crash unplugging the device
	mt7601u: fix rx buffer refcounting
	ARM: imx: build suspend-imx6.S with arm instruction set
	netfilter: nft_dynset: add timeout extension to template
	xfrm: Fix oops in xfrm_replay_advance_bmp
	RDMA/cxgb4: Fix the reported max_recv_sge value
	iwlwifi: pcie: use jiffies for memory read spin time limit
	iwlwifi: pcie: reschedule in long-running memory reads
	mac80211: pause TX while changing interface type
	can: dev: prevent potential information leak in can_fill_info()
	iommu/vt-d: Gracefully handle DMAR units with no supported address widths
	iommu/vt-d: Don't dereference iommu_device if IOMMU_API is not built
	NFC: fix resource leak when target index is invalid
	NFC: fix possible resource leak
	Linux 4.9.255

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I1ead684216d7f27b8209f4d680f40b3619d16e3a