staging: wilc1000: removes unused CFG80211_DBG tag

This patch removes unused CFG80211_DBG tag.

Signed-off-by: Chris Park <chris.park@atmel.com>
Signed-off-by: Leo Kim <leo.kim@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>