staging: r8188eu: the frame type is shifted out

The index calculation in mgt_dispatcher does not use the frame type. The
4-bit right shift ignores protocol version and frame type.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220417102221.466524-4-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_mlme_ext.c

@@ -408,8 +408,7 @@ void mgt_dispatcher(struct adapter *padapter, struct recv_frame *precv_frame)
 
 	ptable = mlme_sta_tbl;
 
-	index = (le16_to_cpu(hdr->frame_control) &
-		 (IEEE80211_FCTL_STYPE | IEEE80211_FCTL_FTYPE)) >> 4;
+	index = (le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
 	if (index > 13)
 		return;
 	ptable += index;