USB: Spelling fixes

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index 80d99bc..dce305b 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -211,7 +211,7 @@
  * low/fullspeed transfer can "carry over" from one uframe to the next,
  * since the TT just performs downstream transfers in sequence.
  *
- * For example two seperate 100 usec transfers can start in the same uframe,
+ * For example two separate 100 usec transfers can start in the same uframe,
  * and the second one would "carry over" 75 usecs into the next uframe.
  */
 static void