staging: r8188eu: use ieee80211 struct for aid

Remove the GetAid macro and map the frame data to a struct
ieee80211_pspoll instead. We can then read the aid component.

psta->aid is in host endianness and has a 0x3FFF mask applied. We have to
convert our read value as well and apply the mask before we compare it to
psta->aid.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220403164526.357371-6-martin@kaiser.cx


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>