staging: wlan-ng: rename DIDmib_dot11smt_dot11WEPDefaultKeysTable_key in p80211metadef.h

Rename DIDmib_dot11smt_dot11WEPDefaultKeysTable_key in p80211metadef.h
to didmib_dot11smt_wepdefaultkeystable_key to fix "Avoid CamelCase"
message from checkpatch and conform to the coding style
guidelines. Also shorten name by removing repeated use of "DOT11" to
ease readability and reduce long lines.

Signed-off-by: Tim Collier <osdevtc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>