staging: fsl-dpaa2/eth: Remove incorrect error path

Not having Rx hashing distribution enabled for an
interface is a valid configuration and shouldn't be
treated as an error.

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