net: atlantic: minor MACSec code cleanup

This patch fixes a couple of minor merge issues found in macsec_api.c
after corresponding patch series has been applied.

These are not real bugs, so pushing to net-next.

Signed-off-by: Mark Starovoytov <mstarovoitov@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>