sched: use malloc instead of memzone for allocation

sched: use malloc instead of memzone for allocation

The existing rte scheduler can only be safely configured once per port
because a memory zone has a fixed size once it is created and can never
be freed or change in size.

This patch changes the scheduler to use rte_malloc instead. This allows
for a port to be reconfigured by doing rte_sched_port_free followed
rte_sched_port_config.

The patch also removes the now unused name parameter from the
port parameters structure.

Signed-off-by: Stephen Hemminger <shemming@brocade.com>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>