greybus: protocol.h: macros should not have a trailing ';'

Remove the trailing ';' character from the gb_protocol_driver() macro as
it's not needed and is bad coding style.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>

drivers/staging/greybus/protocol.h

@@ -97,7 +97,7 @@ static void __exit protocol_exit(void)			\
 {							\
 	gb_protocol_deregister(__protocol);		\
 }							\
-module_exit(protocol_exit);
+module_exit(protocol_exit)
 
 /*
  * Macro to create get_version() routine for protocols