qlcnic: using too much stack

qlcnic_pci_info structs are 128 bytes so an array of 8 uses 1024 bytes.
That's a lot if you run with 4K stacks.  I allocated them with kcalloc()
instead.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>