Saucy update to v3.11.4 stable release

SRU Justification

    Impact:
       The upstream process for stable tree updates is quite similar
       in scope to the Ubuntu SRU process, e.g., each patch has to
       demonstrably fix a bug, and each patch is vetted by upstream
       by originating either directly from Linus' tree or in a minimally
       backported form of that patch. The v3.11.4 upstream stable
       patch set is now available. It should be included in the Ubuntu
       kernel as well.

       git://git.kernel.org/

    TEST CASE: TBD

       The following patches are in the v3.11.4 stable release:
Linux 3.11.4
irq: Always define devm_{request_threaded,free}_irq()
ALSA: compress: Fix compress device unregister.
hwmon: (applesmc) Check key count before proceeding
drm/radeon: fix hdmi audio on DCE3.0/3.1 asics
drm/radeon: add missing hdmi callbacks for rv6xx
drm/radeon: disable tests/benchmarks if accel is disabled
drm/radeon: don't set default clocks for SI when DPM is disabled
drm/radeon: Make r100_cp_ring_info() and radeon_ring_gfx() safe (v2)
drm/radeon: avoid UVD corruption on AGP cards using GPU gart
drm/radeon/cik: fix overflow in vram fetch
drm/radeon/cik: Fix encoding of number of banks in tiling configuration info
drm/radeon/cik: Fix printing of client name on VM protection fault
drm/i915/dp: increase i2c-over-aux retry interval on AUX DEFER
drm/i915: preserve pipe A quirk in i9xx_set_pipeconf
dm mpath: disable WRITE SAME if it fails
dm-snapshot: fix performance degradation due to small hash size
dm snapshot: workaround for a false positive lockdep warning
driver core : Fix use after free of dev->parent in device_shutdown
usb/core/devio.c: Don't reject control message to endpoint with wrong direction bit
usb: dwc3: add support for Merrifield
usb: dwc3: pci: add support for BayTrail
fsl/usb: Resolve PHY_CLK_VLD instability issue for ULPI phy
USB: Fix breakage in ffs_fs_mount()
USB: UHCI: accept very late isochronous URBs
USB: OHCI: accept very late isochronous URBs
xhci: Fix race between ep halt and URB cancellation
USB: fix PM config symbol in uhci-hcd, ehci-hcd, and xhci-hcd
xhci: Fix oops happening after address device timeout
xhci: Ensure a command structure points to the correct trb on the command ring
cw1200: Use a threaded oneshot irq handler for cw1200_spi
Revert "cw1200: Don't perform SPI transfers in interrupt context"
drm/i915/tv: clear adjusted_mode.flags
staging: vt6656: [BUG] iwctl_siwencodeext return if device not open
staging: vt6656: [BUG] main_usb.c oops on device_close move flag earlier.
ARM: 7837/3: fix Thumb-2 bug in AES assembler code
serial: pch_uart: fix tty-kref leak in dma-rx path
serial: pch_uart: fix tty-kref leak in rx-error path
serial: tegra: fix tty-kref leak
tty: Fix SIGTTOU not sent with tcflush()
mei: cancel stall timers in mei_reset
mei: bus: stop wait for read during cl state transition
mei: make me client counters less error prone
x86, efi: Don't map Boot Services on i386
tools lib lk: Uninclude linux/magic.h in debugfs.c
x86/reboot: Add quirk to make Dell C6100 use reboot=pci automatically
kernel/reboot.c: re-enable the function of variable reboot_default
bcache: Fix flushes in writeback mode
bcache: Fix for handling overlapping extents when reading in a btree node
bcache: Fix a shrinker deadlock
bcache: Fix a dumb CPU spinning bug in writeback
bcache: Fix a flush/fua performance bug
bcache: Fix a writeback performance regression
bcache: Fix for when no journal entries are found
bcache: Strip endline when writing the label through sysfs
bcache: Fix a dumb journal discard bug
sysv: Add forgotten superblock lock init for v7 fs
block: Fix bio_copy_data()