net/core/dev.c: fix kernel-doc warning

Fix kernel-doc warning:

Warning(net/core/dev.c:5745): No description found for parameter 'dev'

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: "David S. Miller" <[e-mail]>
Cc: [e-mail]
Signed-off-by: David S. Miller <[e-mail]>

net/core/dev.c

···
 
 /**
  * netdev_wait_allrefs - wait until all references are gone.
+ * @dev: target net_device
  *
  * This is called when unregistering network devices.
  *