system: update kernel

-wireless: move bcmdhd to bcmdhd_samsung
-wireless: bcmdhd: samsung: move everything to root
wake_up_process() should be never used to wakeup a TASK_STOPPED/TRACED task
cpuset: fix cpuset_print_task_mems_allowed() vs rename() race
mm: fix pageblock bitmap allocation
mm/fadvise.c: drain all pagevecs if POSIX_FADV_DONTNEED fails to discard all
tmpfs: fix use-after-free of mempolicy object
vt: synchronize_rcu() under spinlock is not nice...
mm: prevent mmap_cache race in find_vma()
sched: Convert BUG_ON()s in try_to_wake_up_local() to WARN_ON_ONCE()s
cgroup: fix an off-by-one bug which may trigger BUG_ON()
-Revert "block: introduce the BFQ-v6 I/O sched for 3.1"
-Revert "block: prepare I/O context code for BFQ-v6 for 3.1"
-Revert "block: cgroups, kconfig, build bits for BFQ-v4-3.1"
block: prepare I/O context code for BFQ-v6r1 for 3.1
block: cgroups, kconfig, build bits for BFQ-v6r1-3.1
block: introduce the BFQ-v6r1 I/O sched for 3.1
block, bfq: add Early Queue Merge (EQM) to BFQ-v6r1 for 3.1.0
wireless: bcmdhd: update from google commonm (3.4)
-net: backport wireless from 3.4 (google common)
-wireless: bcmdhd: use BROADCOM_WIFI_RESERVED_MEM for DHD_USE_STATIC_BUF
-wireless: bcmdhd: omit/add some flag(s) for SAMSUNG_VARIATION_TEGRA
-wireless: bcmdhd: add READ_MACADDR for SAMSUNG_VARIATION_TEGRA
-wireless: bcmdhd: add CUSTOMER_SET_COUNTRY for SAMSUNG_VARIATION_TEGRA
-wireless: bcmdhd: samsung: update from i9500
-wireless: bcmdhd: samsung: modify accordingly for 3.4 wireless backport
-wireless: bcmdhd: samsung: remove DHD_USE_STATIC_BUF (config option)
-defconfig: jb: switch to bcmdhd (google)
-wireless: bcmdhd: set WL_CFG80211_GON_COLLISION and WL_SCB_TIMEOUT
-wireless: bcmdhd: add P4/P3 specific flags
net: wireless: bcmdhd: Update to version 1.88.21
-wireless: bcmdhd: add SUPPORT_AUTO_CHANNEL