net: dsa: microchip: Fix spelling mistake "unxpexted" -> "unexpected"

There is a spelling mistake in a dev_err message. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20230918132142.199638-1-colin.i.king@gmail.com


Signed-off-by: Paolo Abeni <pabeni@redhat.com>