net/mlx5: DR, Move HW STEv0 match logic to a separate file

Move current STE match logic to a seprate file.
This file will be used for HW specific STEv0.

Future patches will add functionality for v1 steering.
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Reviewed-by: Alex Vesker <valex@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/Makefile

@@ -83,5 +83,6 @@ mlx5_core-$(CONFIG_MLX5_SW_STEERING) += steering/dr_domain.o steering/dr_table.o
 					steering/dr_matcher.o steering/dr_rule.o \
 					steering/dr_icm_pool.o steering/dr_buddy.o \
 					steering/dr_ste.o steering/dr_send.o \
+					steering/dr_ste_v0.o \
 					steering/dr_cmd.o steering/dr_fw.o \
 					steering/dr_action.o steering/fs_dr.o

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.h

@@ -111,4 +111,6 @@ struct mlx5dr_ste_ctx {
 	void DR_STE_CTX_BUILDER(src_gvmi_qpn);
 };
 
+extern struct mlx5dr_ste_ctx ste_ctx_v0;
+
 #endif  /* _DR_STE_ */