wil6210: fix stop p2p device handling

fix stop p2p device handling to identify between search
and listen and update the upper layers with the appropriate
notification.
The stop of p2p radio operations also needs to be performed
in __wil_down.

Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: d35c2b6f8ffa75d430fd0fbbc5062f738c44f6e4
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git


CRs-Fixed: 1063261
Change-Id: I79f8522ae84dd209cb98c3bbc52cfaeb199dd342
Signed-off-by: Maya Erez <merez@codeaurora.org>