staging:r8188eu: replace get_(d|s)a with ieee80211_get_(D|S)A

get_da()/get_sa() duplicate native ieee80211_get_(D|S)A functions.
Remove get_(d|s)a, use ieee80211_get_(D|S)A instead.

Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Link: https://lore.kernel.org/r/20210314090247.21181-2-insafonov@gmail.com


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