qlcnic: fix mac addr read

o Mac addr was read from flash for every fw reset
for Non-priviledge function.It should be read only once.
o Remove unnecessary get_mac_addr callback

Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>