rtl8xxxu: Correct rxdesc16 definition

This corrects the definition of rxdesc16 to correctly specify pkt_cnt
for aggregated packets. This is based on the code of the vendor
rtl8723au driver, as opposed to the struct definitions they use.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h

@@ -135,7 +135,8 @@ struct rtl8xxxu_rxdesc16 {
 
 	u32 seq:12;
 	u32 frag:4;
-	u32 nextpktlen:14;
+	u32 pkt_cnt:8;
+	u32 reserved:6;
 	u32 nextind:1;
 	u32 reserved0:1;
 
@@ -198,7 +199,8 @@ struct rtl8xxxu_rxdesc16 {
 
 	u32 reserved0:1;
 	u32 nextind:1;
-	u32 nextpktlen:14;
+	u32 reserved:6;
+	u32 pkt_cnt:8;
 	u32 frag:4;
 	u32 seq:12;