net/mlx5: DR, Add CONFIG_MLX5_SW_STEERING for software steering support

Add new mlx5 Kconfig flag to allow selecting software steering
support and compile all the steering files only if the flag is
selected.

Signed-off-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/Kconfig

@@ -154,3 +154,10 @@ config MLX5_EN_TLS
 	Build support for TLS cryptography-offload accelaration in the NIC.
 	Note: Support for hardware with this capability needs to be selected
 	for this option to become available.
+
+config MLX5_SW_STEERING
+	bool "Mellanox Technologies software-managed steering"
+	depends on MLX5_CORE_EN && MLX5_ESWITCH
+	default y
+	help
+	Build support for software-managed steering in the NIC.

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

@@ -67,3 +67,10 @@ mlx5_core-$(CONFIG_MLX5_EN_IPSEC) += en_accel/ipsec.o en_accel/ipsec_rxtx.o \
 
 mlx5_core-$(CONFIG_MLX5_EN_TLS) += en_accel/tls.o en_accel/tls_rxtx.o en_accel/tls_stats.o \
 				   en_accel/ktls.o en_accel/ktls_tx.o
+
+mlx5_core-$(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_crc32.o \
+					steering/dr_ste.o steering/dr_send.o \
+					steering/dr_cmd.o steering/dr_fw.o \
+					steering/dr_action.o

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

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+subdir-ccflags-y += -I$(src)/..