UBI: fix EBADMSG handling

'ubi_io_read_data()' may return EBADMSG in case of an ECC error,
and we should not panic because of this. We have CRC32 checksum
and may check the data. So just ignore the EBADMSG error.

This patch also fixes a minor spelling error at the same time.
Signed-off-by: NZoltan Sogor <weth@inf.u-szeged.hu>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>

drivers/mtd/ubi/eba.c

@@ -1022,7 +1022,7 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
 	}
 
 	/*
-	 * OK, now the LEB is locked and we can safely start moving iy. Since
+	 * OK, now the LEB is locked and we can safely start moving it. Since
 	 * this function utilizes thie @ubi->peb1_buf buffer which is shared
 	 * with some other functions, so lock the buffer by taking the
 	 * @ubi->buf_mutex.

drivers/mtd/ubi/scan.c

@@ -320,7 +320,7 @@ static int compare_lebs(struct ubi_device *ubi, const struct ubi_scan_leb *seb,
 	}
 
 	err = ubi_io_read_data(ubi, buf, pnum, 0, len);
-	if (err && err != UBI_IO_BITFLIPS)
+	if (err && err != UBI_IO_BITFLIPS && err != -EBADMSG)
 		goto out_free_buf;
 
 	data_crc = be32_to_cpu(vid_hdr->data_crc);