drivers/net/vsc9953: Add commands for VLAN ingress filtering

The command:
ethsw [port <port_no>] ingress filtering
     { [help] | show | enable | disable }
  - enable/disable VLAN ingress filtering on port

can be used to enable/disable/show VLAN ingress filtering on a port.
This command has also been added to the ethsw generic parser
from common/cmd_ethsw.c

Signed-off-by: Johnson Leung <johnson.leung@freescale.com>
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@freescale.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/include/ethsw.h b/include/ethsw.h
index 18d2b26..2d3c12a 100644
--- a/include/ethsw.h
+++ b/include/ethsw.h
@@ -39,6 +39,8 @@
 	ethsw_id_classified,
 	ethsw_id_shared,
 	ethsw_id_private,
+	ethsw_id_ingress,
+	ethsw_id_filtering,
 	ethsw_id_count,	/* keep last */
 };
 
@@ -84,6 +86,8 @@
 	int (*port_egr_vlan_set)(struct ethsw_command_def *parsed_cmd);
 	int (*vlan_learn_show)(struct ethsw_command_def *parsed_cmd);
 	int (*vlan_learn_set)(struct ethsw_command_def *parsed_cmd);
+	int (*port_ingr_filt_show)(struct ethsw_command_def *parsed_cmd);
+	int (*port_ingr_filt_set)(struct ethsw_command_def *parsed_cmd);
 };
 
 int ethsw_define_functions(const struct ethsw_command_func *cmd_func);