Introducing SAI_PORT_ATTR_PORT_PG_PKT_DROP_STATUS (#2234)

In this map, the key is the PG index and the status value (clear-on-read)
for each PG is from {0, 1}, where 0 indicates no drops were observed and 1
indicates packet drops.

Signed-off-by: Prasun Sinha <prasunsinha@google.com>

Author: prasunsinha1

inc/saiport.h

@@ -2786,6 +2786,18 @@ typedef enum _sai_port_attr_t
      */
     SAI_PORT_ATTR_PRBS_PER_LANE_BER_LIST,
 
+    /**
+     * @brief Packet drop status for all PGs of a port.
+     *
+     * The key is the PG index and the status value (clear-on-read) for each PG
+     * is from {0, 1}, where 0 indicates no drops were observed and 1 indicates
+     * packet drops.
+     *
+     * @type sai_map_list_t
+     * @flags READ_ONLY
+     */
+    SAI_PORT_ATTR_PORT_PG_PKT_DROP_STATUS,
+
     /**
      * @brief End of attributes
      */