qcacmn: Add dp support for traffic end indication

Based on traffic end indication marked packet coming
from network stack, send indication packet to fw via
exception path to terminate ongoing SP.

Change-Id: Ia2be60d485be4b05665cf6b1684af9258417ffb1
CRs-Fixed: 3207392

dp/wifi3.0/dp_tx.h

@@ -59,6 +59,7 @@
 #define DP_TX_DESC_FLAG_UNMAP_DONE	0x800
 #define DP_TX_DESC_FLAG_TX_COMP_ERR	0x1000
 #define DP_TX_DESC_FLAG_FLUSH		0x2000
+#define DP_TX_DESC_FLAG_TRAFFIC_END_IND	0x4000
 
 #define DP_TX_EXT_DESC_FLAG_METADATA_VALID 0x1