staging: fsl-dpaa2/eth: Move print message

Let the driver remove() function print an informative message
after it finishes removing the network interface, not at an
arbitrary point during cleanup.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>