net: wireless: bcmdhd: Reduce scan dwell time only in power-save mode

b/17411001

Change-Id: Ia1d34303089e491116b027d2e310de4c4dec9482
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

Conflicts:

	drivers/net/wireless/bcmdhd/Makefile
	drivers/net/wireless/bcmdhd/dhd.h
	drivers/net/wireless/bcmdhd/dhd_linux.c
	drivers/net/wireless/bcmdhd/wl_cfg80211.c

Conflicts:

	drivers/net/wireless/bcmdhd/Makefile
bcmdhd: add dev_priv struct required by previous commit
net: wireless: bcmdhd: Reduce scan dwell time to reduce power

Scan dwell time is reduced for 40/80 to 20/40 (normal)
and 20/30 (power-save). Scan quality reduction is ~ 20%.

b/17485849

Change-Id: I00d6e5ef83df8b075b48736daaa6e814dd09054a
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
fs: exFAT: Update to v1.2.9

 * From KitKat source drop

Change-Id: I7ad46ae9abdb0f2b83a482f81ac7c30b3f32953c

Conflicts:

	fs/exfat/exfat_super.c
	fs/exfat/exfat_version.h
Update defconfig
Build v3.98 EXP2 - Do NOT build this unless (see description)

Dependent on

slayher/proprietary_vendor_samsung@b6b08ae

http://review.cyanogenmod.org/#/c/73824/