qcacmn: populate qos_null in rx state

sw_frame_group_id decides process for frame. USER_STATS tlv case uses
sw_frame_group_id to add qos_null frame control to rx_status.

Change-Id: Ia3da8dbe4fc4c2d0f21fa8864e6b4e87170ba8f6

hal/wifi3.0/qca6490/hal_6490_rx.h

@@ -273,6 +273,9 @@
 #define HAL_RX_GET_PPDU_ID(rx_mpdu_start)	\
 	HAL_RX_GET(rx_mpdu_start, RX_MPDU_INFO_9, PHY_PPDU_ID)
 
+#define HAL_RX_GET_SW_FRAME_GROUP_ID(rx_mpdu_start)	\
+	HAL_RX_GET(rx_mpdu_start, RX_MPDU_INFO_9, SW_FRAME_GROUP_ID)
+
 #define HAL_REO_R0_CONFIG(soc, reg_val, reo_params)		\
 	do { \
 		reg_val &= \