UBIFS: fix spelling of "scanned"

Randy Dunlap pointed that we should use "scanned" instead of "scaned". This
patch makes the correction.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
diff --git a/fs/ubifs/scan.c b/fs/ubifs/scan.c
index 890d42c..89adbc4 100644
--- a/fs/ubifs/scan.c
+++ b/fs/ubifs/scan.c
@@ -131,7 +131,7 @@
  * @offs: offset to start at (usually zero)
  * @sbuf: scan buffer (must be c->leb_size)
  *
- * This function returns the scaned information on success and a negative error
+ * This function returns the scanned information on success and a negative error
  * code on failure.
  */
 struct ubifs_scan_leb *ubifs_start_scan(const struct ubifs_info *c, int lnum,
@@ -257,7 +257,7 @@
  * @quiet: print no messages
  *
  * This function scans LEB number @lnum and returns complete information about
- * its contents. Returns the scaned information in case of success and,
+ * its contents. Returns the scanned information in case of success and,
  * %-EUCLEAN if the LEB neads recovery, and other negative error codes in case
  * of failure.
  *