staging: fsl-dpaa2/ethsw: remove unnecessary memset

The ethtool core already zeroes the memory before calling
.get_ethtool_stats() thus making the memset unnecessary. Remove it.

Reported-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/1565700187-16048-7-git-send-email-ioana.ciornei@nxp.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>