net: ethernet: mediatek: fix missing changes merged for conflicts overlapping commits

net: ethernet: mediatek: fix missing changes merged for conflicts overlapping commits

add the missing commits about
1)
Commit 0a2a696504c5c6f320a275e2eac80b12cbd8b26a
("remove redundant free_irq for devm_request_ir allocated irq")
2)
Commit 8dbc93dbc7b3ac45e7e0832f43f65fb480e190f2
("fix logic unbalance between probe and remove")

during merge for conflicts overlapping commits by
Commit 6590ef1dee01009357d726812479c79fc1a6c005
("Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net")

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>