Revert "import ath6kl subsystem from GT-S6310_Opensource"

This reverts commit aa368519ba6f3f6e871bea5f6f0db40db011045b.

Conflicts:
	drivers/net/wireless/ath/ath6kl/softmac.c
	include/compat/net/cfg80211.h

Change-Id: I169aac14be2bae4493a2997e90dc3e7da35078e4