Revert "vlan: move dev_put into vlan_dev_uninit"

Revert "vlan: move dev_put into vlan_dev_uninit"

This reverts commit aaa1b061b68a80326107a7022d31da39a86c668c.

Since commit ae8ce4d9ef4b ("net: allow out-of-order netdev unregistration")
fixed the issue in a better way, this patch is to revert the previous fix,
as it might bring back the old problem fixed by commit dd5b14519583 ("net:
vlan: fix a UAF in vlan_dev_real_dev()").

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/563c0a6e48510ccbff9ef4715de37209695e9fc4.1645592097.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>