staging: wlan-ng: rename DIDmib_p2_p2NIC_p2PRISupRange in p80211metadef.h

Rename DIDmib_p2_p2NIC_p2PRISupRange in p80211metadef.h to
DIDMIB_P2_NIC_PRISUPRANGE to fix "Avoid CamelCase" message from
checkpatch and conform to the coding style guidelines. Also shorten
name by removing repeated use of "P2" to ease readability and reduce
long lines.

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