Staging: comedi: poc: Adding some KERN_ facility level

This fixes some coding style issues like include KERN_ facility levels
in some printk() and one trailing whitespace error.
Signed-off-by: Chihau Chau <chihau@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/poc.c

@@ -122,22 +122,21 @@ static int poc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 	unsigned int iosize;
 
 	iobase = it->options[0];
-	printk("comedi%d: poc: using %s iobase 0x%lx\n", dev->minor,
+	printk(KERN_INFO "comedi%d: poc: using %s iobase 0x%lx\n", dev->minor,
 	       this_board->name, iobase);
 
 	dev->board_name = this_board->name;
 
 	if (iobase == 0) {
-		printk("io base address required\n");
+		printk(KERN_ERR "io base address required\n");
 		return -EINVAL;
 	}
 
 	iosize = this_board->iosize;
 	/* check if io addresses are available */
 	if (!request_region(iobase, iosize, "dac02")) {
-		printk
-		    ("I/O port conflict: failed to allocate ports 0x%lx to "
-					"0x%lx\n", iobase, iobase + iosize - 1);
+		printk(KERN_ERR "I/O port conflict: failed to allocate ports "
+			"0x%lx to 0x%lx\n", iobase, iobase + iosize - 1);
 		return -EIO;
 	}
 	dev->iobase = iobase;