qlcnic: Fix function return error check

Driver was treating -ve return value as success in case of
qlcnic_enable_msi_legacy() failure

Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
Simple merge