greybus: loopback: fix an incorrect comment

Fix a comment that incorrectly says the delay between messages is
limited to 1024 msec; it actually must be <= 1000 msec.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/loopback.c

@@ -148,7 +148,7 @@ gb_loopback_ro_attr(error, d);
 gb_loopback_attr(type, d);
 /* Size of transfer message payload: 0-4096 bytes */
 gb_loopback_attr(size, u);
-/* Time to wait between two messages: 0-1024 ms */
+/* Time to wait between two messages: 0-1000 ms */
 gb_loopback_attr(ms_wait, d);
 
 #define dev_stats_attrs(name)						\