eventdev: allocate max space for internal arrays

Allocate max space for internal port, port config, queue config and
link map arrays.
Introduce new macro RTE_EVENT_MAX_PORTS_PER_DEV and set it to max
possible value.
This simplifies the port and queue reconfigure scenarios and will
also allow inline functions to refer pointer to internal port data
without extra checking of current number of configured queues.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>