net/mlx5: fs, add HWS fte API functions

Add create, destroy and update fte API functions for adding, removing
and updating flow steering rules in HW Steering mode. Get HWS actions
according to required rule, use actions from pool whenever possible.

Signed-off-by: Moshe Shemesh <[email protected]>
Reviewed-by: Yevgeny Kliteynik <[email protected]>
Reviewed-by: Mark Bloch <[email protected]>
Signed-off-by: Tariq Toukan <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: mosheshemesh2

drivers/net/ethernet/mellanox/mlx5/core/fs_core.h

@@ -254,7 +254,10 @@ struct fs_fte_dup {
 /* Type of children is mlx5_flow_rule */
 struct fs_fte {
 	struct fs_node			node;
-	struct mlx5_fs_dr_rule		fs_dr_rule;
+	union {
+		struct mlx5_fs_dr_rule		fs_dr_rule;
+		struct mlx5_fs_hws_rule		fs_hws_rule;
+	};
 	u32				val[MLX5_ST_SZ_DW_MATCH_PARAM];
 	struct fs_fte_action		act_dests;
 	struct fs_fte_dup		*dup;