[IA64] ioc4_serial: fix printk format warnings

drivers/serial/ioc4_serial.c:943: warning: format '%lx' expects type 'long unsigned int', but argument 2 has type 'long long unsigned int'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Pat Gefre <pfg@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>