net/mlx5e: Rename MACsec flow steering functions/parameters to suit core naming style

Rename MACsec flow steering(macsec_fs) functions and parameters from
ethernet(core/en_accel) naming convention to core naming convention.

Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>