Add kernel package 'mt7916-firmware' with firmware files for MT7916E devices.
These share the same driver as the MT7915 chipset, but use their own firmware.
Tested using a pair of AsiaRF AW7916-NPD cards.
Signed-off-by: Andrew Powers-Holmes <aholmes@omnom.net>
(cherry picked from commit 94d0cb9d2ec23fb15acd1fc17a351983f8771d13)