staging: r8188eu: use ieee80211_get_SA

Use ieee80211_get_SA in update_recvframe_phyinfo_88e instead of the
driver-specific get_sa function.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20221031205412.124871-4-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/hal/rtl8188e_rxdesc.c

@@ -135,7 +135,7 @@ void update_recvframe_phyinfo_88e(struct recv_frame *precvframe, struct phy_stat
 			sa = padapter->mlmepriv.cur_network.network.MacAddress;
 		/* to do Ad-hoc */
 	} else {
-		sa = get_sa(wlanhdr);
+		sa = ieee80211_get_SA(hdr);
 	}
 
 	pstapriv = &padapter->stapriv;