UBI: fix minor stylistic issues

Fix checkpatch.pl errors and warnings:

* space before tab
* line over 80 characters
* include linux/ioctl.h instead of asm/ioctl.h

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

drivers/mtd/ubi/io.c

@@ -189,8 +189,8 @@ retry:
 		}
 
 		if (retries++ < UBI_IO_RETRIES) {
-			dbg_io("error %d%s while reading %d bytes from PEB %d:%d,"
-			       " read only %zd bytes, retry",
+			dbg_io("error %d%s while reading %d bytes from PEB "
+			       "%d:%d, read only %zd bytes, retry",
 			       err, errstr, len, pnum, offset, read);
 			yield();
 			goto retry;