Message logged by 'dev_xxx()' or 'pr_xxx()' should end with a '\n'.

Fixes: 93a76530 ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>