net/wireless/wl18xx: Add missing MODULE_FIRMWARE
net/wireless/wl18xx: Add missing MODULE_FIRMWARE

Fixes the output of 'modinfo --field firmware'.

Signed-off-by: Geoff Levand <c3918f39022407dee6a0056ceca9b1aa80e8e4ce@infradead.org>
Signed-off-by: Kalle Valo <7081a7d99b8c74c0698a728df19e3915a995d7e1@codeaurora.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs