Add Broadcom DHD driver from package bcmdhd.5.90.195.26.1.6.1

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
bcmdhd: fix Android build (missing dtoh32/16 macros)

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
bcmdhd: change default firmware locations to match non-Android use

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
oc_defconfig: add BCMDHD, DEVTMPFS

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
oc_defconfig: bcmdhd driver wants CFG80211

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
bcmdhd: deprecate annoying debug message
bcmdhd: remove dependencies on WIRELESS_EXT
oc_defconfig: remove WIRELESS_EXT