drivers/net/qla3xxx.c: Update logging message style

Use pr_<level>
Use netdev_<level>
Use netif_<level>
Remove #define PFX
Improve a couple of loops to avoid deep indentation.

Compile tested only

$ size drivers/net/qla3xxx.o.*
   text    data     bss     dec     hex filename
  51603     212   13864   65679   1008f drivers/net/qla3xxx.o.old
  50413     212   13864   64489    fbe9 drivers/net/qla3xxx.o.new

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>