Staging: comedi: kcomedilib: fix coding style issues in kcomedilib_main.c

This is a patch to the kcomedilib_main.c file that fixes up some printk() warning issues.

Signed-off-by: Gustavo Silva <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/comedi/kcomedilib/kcomedilib_main.c

···
 	s = dev->subdevices + insn->subdev;
 
 	if (s->type == COMEDI_SUBD_UNUSED) {
-		printk("%d not useable subdevice\n", insn->subdev);
+		printk(KERN_ERR "%d not useable subdevice\n", insn->subdev);
 		ret = -EIO;
 		goto error;
 	}
···
 
 	ret = comedi_check_chanlist(s, 1, &insn->chanspec);
 	if (ret < 0) {
-		printk("bad chanspec\n");
+		printk(KERN_ERR "bad chanspec\n");
 		ret = -EINVAL;
 		goto error;
 	}