UBI: rename struct ubi_scan_info

Rename 'struct ubi_scan_info' to 'struct ubi_attach_info'. This is part
of the code re-structuring I am trying to do in order to add fastmap
in a more logical way. Fastmap can share a lot with scanning, including
the attach-time data structures, which all now have "scan" word in the
name. Let's get rid of this word.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index c8500cb..264482f 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -1182,7 +1182,7 @@
  * reported by real users.
  */
 static void print_rsvd_warning(struct ubi_device *ubi,
-			       struct ubi_scan_info *si)
+			       struct ubi_attach_info *si)
 {
 	/*
 	 * The 1 << 18 (256KiB) number is picked randomly, just a reasonably
@@ -1212,7 +1212,7 @@
  * This function returns zero in case of success and a negative error code in
  * case of failure.
  */
-int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si)
+int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_attach_info *si)
 {
 	int i, j, err, num_volumes;
 	struct ubi_ainf_volume *sv;