drivers/net/netxen/netxen_nic_hw.c: fix printk warnings

drivers/net/netxen/netxen_nic_hw.c: In function 'netxen_nic_pci_mem_read_direct':
drivers/net/netxen/netxen_nic_hw.c:1414: warning: format '%llx' expects type 'long long unsigned int', but argument 3 has type 'u64'
drivers/net/netxen/netxen_nic_hw.c: In function 'netxen_nic_pci_mem_write_direct':
drivers/net/netxen/netxen_nic_hw.c:1487: warning: format '%llx' expects type 'long long unsigned int', but argument 3 has type 'u64'

You don't know what type was used for u64 hence they cannot be printed without
casting.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>