Merge 3.18.76 into android-3.18

Changes in 3.18.76
	ext4: in ext4_seek_{hole,data}, return -ENXIO for negative offsets
	CIFS: Reconnect expired SMB sessions
	HID: usbhid: fix out-of-bounds bug
	crypto: shash - Fix zero-length shash ahash digest crash
	KVM: nVMX: fix guest CR4 loading when emulating L2 to L1 exit
	usb: renesas_usbhs: Fix DMAC sequence for receiving zero-length packet
	iommu/amd: Finish TLB flush in amd_iommu_unmap()
	ALSA: usb-audio: Kill stray URB at exiting
	ALSA: seq: Fix use-after-free at creating a port
	ALSA: seq: Fix copy_from_user() call inside lock
	ALSA: caiaq: Fix stray URB at probe error path
	usb: gadget: composite: Fix use-after-free in usb_composite_overwrite_options
	direct-io: Prevent NULL pointer access in submit_page_section
	fix unbalanced page refcounting in bio_map_user_iov
	USB: serial: cp210x: add support for ELV TFD500
	USB: serial: option: add support for TP-Link LTE module
	USB: serial: qcserial: add Dell DW5818, DW5819
	USB: serial: console: fix use-after-free after failed setup
	ALSA: seq: Fix missing NULL check at remove_events ioctl
	Revert "usb: gadget: inode.c: fix unbalanced spin_lock in ep0_write"
	Linux 3.18.76

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