Revert "bcmdhd: Remove bcm4329 (obsolete)"

This reverts commit 697f7c8d92dde56c67c659c75e257f38a2fb4acd.
hardware-broadcom: Fix makefile

The external/wpa_supplicant don't exists anymore, use
external/wpa_supplicant_6 instead.

Change-Id: Ie02974eeca42d701e32a6c8ff10618ff3e945a20