net: dsa: typo in comment

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220208053210.14831-1-luizluca@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>