Fix Ethernet documentation.

1. Remove incorrect @return tag for void function.
2. Fix build breakage by removing the reference to
   #ETHERNET_SERVICE, which is hidden.

Change-Id: Ia893464bafc8257e48e0bd710d27954b535fcece
1 file changed
tree: 3b1fad238768cb5cf0a5de547935ec2f371da15b
  1. core/
  2. services/
  3. wifi/