drivers/net/vsc9953: Add commands to enable/disable HW learning
The command:
ethsw [port <port_no>] learning { [help] | show | auto | disable }
can be used to enable/disable HW learning on a port.
This patch also adds this command to the generic ethsw parser from
cmd_ethsw.
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>