Merge 3.18.71 into android-3.18

Changes in 3.18.71
	usb: quirks: add delay init quirk for Corsair Strafe RGB keyboard
	USB: serial: option: add support for D-Link DWM-157 C1
	usb: Add device quirk for Logitech HD Pro Webcam C920-C
	usb:xhci:Fix regression when ATI chipsets detected
	USB: core: Avoid race of async_completed() w/ usbdev_release()
	staging/rts5208: fix incorrect shift to extract upper nybble
	driver core: bus: Fix a potential double free
	Input: trackpoint - assume 3 buttons when buttons detection fails
	dlm: avoid double-free on error path in dlm_device_{register,unregister}
	cma: fix calculation of aligned offset
	workqueue: Fix flag collision
	cs5536: add support for IDE controller variant
	scsi: sg: protect against races between mmap() and SG_SET_RESERVED_SIZE
	scsi: sg: recheck MMAP_IO request length with lock held
	btrfs: resume qgroup rescan on rw remount
	locktorture: Fix potential memory leak with rw lock test
	ALSA: msnd: Optimize / harden DSP and MIDI loops
	Bluetooth: Properly check L2CAP config option output buffer length
	ARM: 8692/1: mm: abort uaccess retries upon fatal signal
	xfs: XFS_IS_REALTIME_INODE() should be false if no rt device present
	Linux 3.18.71

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