Currently, as part of wlan_hdd_stop_modules, direct link config
is not being cleared but hif link state vote is cleared, as a
result when hdd_close_adpater() is called, link state is already
cleared, resulting in crash, as config is still enabled.
To fix this, clearing config as part of direct link context
de-initialization.
Change-Id: I1a5de6f427b5bc4dc4fe4346e53354645ad53529
CRs-Fixed: 3495027
a5d6751209