qcacmn: Use sw_peer_id instead of ast_index to get peer

In order to support flow overide feature,
AST table has to be split between RxPCU and DDR.
With this split, RX monitor cannot make use of
ast_index to fetch peer as it is not from DDR.
So make use of sw_peer_id to fetch peer.
This sw_peer_id is derived from RX_MPDU_STAT_START_TLV

Change-Id: Ib2a003a2640fded3287c318d2ad59fd3127af9b6
CRs-fixed: 3004363

hal/wifi3.0/qca6750/hal_6750_rx.h

@@ -279,6 +279,9 @@
 #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_RX_GET_SW_PEER_ID(rx_mpdu_start)	\
+	HAL_RX_GET(rx_mpdu_start, RX_MPDU_INFO_10, SW_PEER_ID)
+
 #define HAL_REO_R0_CONFIG(soc, reg_val, reo_params)		\
 	do { \
 		reg_val &= \