qlcnic-ethtool: set the ethtool_dump flag by ETH_FW_DUMP_DISABLE value that is...

qlcnic-ethtool: set the ethtool_dump flag by ETH_FW_DUMP_DISABLE value that is zero, if firmware dump is disabled.

Signed-off-by: Manish chopra <manish.chopra@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>