Merge 3.18.68 into android-3.18

Changes in 3.18.68
	dccp: purge write queue in dccp_destroy_sock()
	dccp: defer ccid_hc_tx_delete() at dismantle time
	sctp: fully initialize the IPv6 address in sctp_v6_to_addr()
	tcp: when rearming RTO, if RTO time is in past then fire RTO ASAP
	irda: do not leak initialized list.dev to userspace
	net: sched: fix NULL pointer dereference when action calls some targets
	net_sched: fix order of queue length updates in qdisc_replace()
	Input: trackpoint - add new trackpoint firmware ID
	ALSA: core: Fix unexpected error at replacing user TLV
	ALSA: hda - Add stereo mic quirk for Lenovo G50-70 (17aa:3978)
	drm: Release driver tracking before making the object available again
	tracing: Fix freeing of filter in create_filter() when set_str is false
	cifs: Fix df output for users with quota limits
	cifs: return ENAMETOOLONG for overlong names in cifs_open()/cifs_lookup()
	nfsd: Limit end of page list when decoding NFSv4 WRITE
	perf/core: Fix group {cpu,task} validation
	Bluetooth: hidp: fix possible might sleep error in hidp_session_thread
	Bluetooth: cmtp: fix possible might sleep error in cmtp_session
	Bluetooth: bnep: fix possible might sleep error in bnep_session
	iio: imu: adis16480: Fix acceleration scale factor for adis16480
	staging: rtl8188eu: add RNX-N150NUB support
	ACPI / APEI: Add missing synchronize_rcu() on NOTIFY_SCI removal
	Linux 3.18.68

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