bitrate: promote free function to stable

rte_stats_bitrate_free() has been in DPDK since 20.11.

Its signature is very basic as it just frees an opaque
data struct allocated in rte_stats_bitrate_create()
and returns void.

It's unlikely that such a basic signature would need to change
so might as well promote it to stable for the next major ABI.

Signed-off-by: Kevin Traynor <ktraynor@redhat.com>

lib/bitratestats/rte_bitrate.h

@@ -7,8 +7,6 @@
 
 #include <stdint.h>
 
-#include <rte_compat.h>
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -35,7 +33,6 @@ struct rte_stats_bitrates *rte_stats_bitrate_create(void);
  * @param bitrate_data
  *   Pointer allocated by rte_stats_bitrate_create()
  */
-__rte_experimental
 void rte_stats_bitrate_free(struct rte_stats_bitrates *bitrate_data);
 
 /**

lib/bitratestats/version.map

@@ -3,13 +3,8 @@ DPDK_22 {
 
 	rte_stats_bitrate_calc;
 	rte_stats_bitrate_create;
+	rte_stats_bitrate_free;
 	rte_stats_bitrate_reg;
 
 	local: *;
 };
-
-EXPERIMENTAL {
-	global:
-
-	rte_stats_bitrate_free;
-};