Add label attribute for Policer, RIF, Scheduler and UDF

Add label attribute to a few SAI objects that will help during warmboot
object matching.

Signed-off-by: Kishore Gummadidala <kishorg@google.com>

inc/saipolicer.h

@@ -209,6 +209,15 @@ typedef enum _sai_policer_attr_t
      */
     SAI_POLICER_ATTR_OBJECT_STAGE = 0x0000000b,
 
+    /**
+     * @brief Label attribute used to uniquely identify identical policers.
+     *
+     * @type char
+     * @flags CREATE_AND_SET
+     * @default ""
+     */
+    SAI_POLICER_ATTR_LABEL,
+
     /**
      * @brief End of attributes
      */

inc/sairouterinterface.h

@@ -294,6 +294,15 @@ typedef enum _sai_router_interface_attr_t
      */
     SAI_ROUTER_INTERFACE_ATTR_ADMIN_MPLS_STATE,
 
+    /**
+     * @brief Label attribute used to uniquely identify router interface.
+     *
+     * @type char
+     * @flags CREATE_AND_SET
+     * @default ""
+     */
+    SAI_ROUTER_INTERFACE_ATTR_LABEL,
+
     /**
      * @brief End of attributes
      */

inc/saischeduler.h

@@ -129,6 +129,15 @@ typedef enum _sai_scheduler_attr_t
      */
     SAI_SCHEDULER_ATTR_MAX_BANDWIDTH_BURST_RATE = 0x00000006,
 
+    /**
+     * @brief Label attribute used to uniquely identify scheduler.
+     *
+     * @type char
+     * @flags CREATE_AND_SET
+     * @default ""
+     */
+    SAI_SCHEDULER_ATTR_LABEL,
+
     /**
      * @brief End of attributes
      */

inc/saiudf.h

@@ -258,6 +258,15 @@ typedef enum _sai_udf_group_attr_t
      */
     SAI_UDF_GROUP_ATTR_LENGTH,
 
+    /**
+     * @brief Label attribute used to uniquely identify UDF group.
+     *
+     * @type char
+     * @flags CREATE_AND_SET
+     * @default ""
+     */
+    SAI_UDF_GROUP_ATTR_LABEL,
+
     /**
      * @brief End of attributes
      */