ethdev: unify prefix for static functions and variables

ethdev: unify prefix for static functions and variables

Prefix static function and variables with 'eth_dev'.

For some 'rte_' prefix dropped, and for others 'eth_dev' added.
This is useful to differentiate public and static function/variables.

The cleanup is good to for having consistent naming to help new
additions naming.

No functional change, only naming.

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Acked-by: Gaetan Rivet <grive@u256.net>