rapidio: Fix kerneldoc and comment

This patch fix spelling typos found in DocBook/rapidio.xml
Ths file was generated from comments in the source files,
I had to fix them, instead of the xml file.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c
index 47a1b2e..d6a126c 100644
--- a/drivers/rapidio/rio-scan.c
+++ b/drivers/rapidio/rio-scan.c
@@ -83,7 +83,7 @@
  * @destid: destID to reserve
  *
  * Tries to reserve the specified destID.
- * Returns 0 if successfull.
+ * Returns 0 if successful.
  */
 static int rio_destid_reserve(struct rio_net *net, u16 destid)
 {