Staging: comedi: rename check_chanlist to comedi_check_chanlist

It's a global function, so properly name it and move the
export to where the function is located at.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 4fe3d0c..b11f9b0 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -839,7 +839,7 @@
 			goto out;
 		}
 
-		ret = check_chanlist(s, 1, &insn->chanspec);
+		ret = comedi_check_chanlist(s, 1, &insn->chanspec);
 		if (ret < 0) {
 			ret = -EINVAL;
 			DPRINTK("bad chanspec\n");
@@ -1052,7 +1052,7 @@
 	}
 
 	/* make sure each element in channel/gain list is valid */
-	ret = check_chanlist(s, async->cmd.chanlist_len, async->cmd.chanlist);
+	ret = comedi_check_chanlist(s, async->cmd.chanlist_len, async->cmd.chanlist);
 	if (ret < 0) {
 		DPRINTK("bad chanlist\n");
 		goto cleanup;
@@ -1174,7 +1174,7 @@
 		}
 
 		/* make sure each element in channel/gain list is valid */
-		ret = check_chanlist(s, user_cmd.chanlist_len, chanlist);
+		ret = comedi_check_chanlist(s, user_cmd.chanlist_len, chanlist);
 		if (ret < 0) {
 			DPRINTK("bad chanlist\n");
 			goto cleanup;