net: amd-xgbe: fix comparison to bitshift when dealing with a mask

net: amd-xgbe: fix comparison to bitshift when dealing with a mask

BugLink: http://bugs.launchpad.net/bugs/1755179
[ Upstream commit a3276892db7a588bedc33168e502572008f714a9 ]

Due to a typo, the mask was destroyed by a comparison instead of a bit
shift.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>