greybus: properly annotate struct gb_control_timesync_enable_request

A patch from created struct gb_control_timesync_enable_request,
but forgot to properly annotate that the fields are little-endian.  The
code is correct in treating them this way, so there isn't a bug, but
sparse complains.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/greybus_protocols.h

@@ -177,9 +177,9 @@ struct gb_control_interface_version_response {
 
 struct gb_control_timesync_enable_request {
 	__u8	count;
-	__u64	frame_time;
-	__u32	strobe_delay;
-	__u32	refclk;
+	__le64	frame_time;
+	__le32	strobe_delay;
+	__le32	refclk;
 } __packed;
 /* timesync enable response has no payload */