remote_bitbang_sysfsgpio: fix reset handling

When both SRST and TRST asserted, 'u' is sent to remote bitbang.
Fix for correct handling of such a case

Change-Id: I2a93ff71f5bbae658e6c0c3649a9fbcca2c5a14b
Signed-off-by: Aleksey Shargalin <myokaski@gmail.com>
Reviewed-on: http://openocd.zylin.com/4283
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

contrib/remote_bitbang/remote_bitbang_sysfsgpio.c

@@ -302,7 +302,7 @@ static void process_remote_protocol(void)
 			break;
 		else if (c == 'b' || c == 'B') /* Blink */
 			continue;
-		else if (c >= 'r' && c <= 'r' + 2) { /* Reset */
+		else if (c >= 'r' && c <= 'r' + 3) { /* Reset */
 			char d = c - 'r';
 			sysfsgpio_reset(!!(d & 2),
 					(d & 1));