Revert "net: ethernet: cavium: use div64_u64() instead of do_div()"

This reverts commit 038fcdaf

.

Christophe points out div64_u64() and do_div() have different
calling conventions. One updates the param, the other returns
the result.

Reported-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/all/056a7276-c6f0-cd7e-9e46-1d8507a0b6b1@wanadoo.fr/
Fixes: 038fcdaf

 ("net: ethernet: cavium: use div64_u64() instead of do_div()")
Link: https://lore.kernel.org/r/20220211020544.3262694-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>