Revert "import ath6kl subsystem from GT-S6310_Opensource"

This reverts commit ad2296f4a57524c1e6d7a2b2adeff646488937c3.

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

Change-Id: Iaaa3a946876336a3a4942c627891f0d753234cc4