trivial: fix typo milisecond/millisecond for documentation and source comments.

Signed-off-by: Martin Olsson <martin@minimum.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index eabf20e..db964db 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -102,7 +102,7 @@
 	__u8 shadow_mcr;
 	__u8 shadow_lsr;
 	__u8 lsr_mask;
-	__u32 ump_read_timeout;		/* Number of miliseconds the UMP will
+	__u32 ump_read_timeout;		/* Number of milliseconds the UMP will
 					   wait without data before completing
 					   a read short */
 	int baud_rate;