wil6210: remove reset file from debugfs

Reset file is not used and may cause race conditions
with operational driver if used.

Change-Id: Iaca10f63fd959bddd53b43762a1e1558dd5b8db0
Signed-off-by: Karthick Gopalasubramanian <kargop@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Git-commit: 32dcfe8316cdbd885542967c0c85f5b9de78874b
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git


Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Lior David <liord@codeaurora.org>