scsi: qla2xxx: Fix ql_dump_buffer

Recent printk changes for KERN_CONT cause this logging to be defectively
emitted on multiple lines.  Fix it.

Also reduces object size a trivial amount.

$ size drivers/scsi/qla2xxx/qla_dbg.o*
   text	   data	    bss	    dec	    hex	filename
  39125	      0	      0	  39125	   98d5	drivers/scsi/qla2xxx/qla_dbg.o.new
  39164	      0	      0	  39164	   98fc	drivers/scsi/qla2xxx/qla_dbg.o.old

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>