commands: allow scan_chain command to be executed during config

Adding taps and then dumping them is quite reasonable thing
to do in a config script.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

src/jtag/tcl.c

@@ -1674,7 +1674,7 @@ static const struct command_registration jtag_command_handlers[] = {
 	{
 		.name = "scan_chain",
 		.handler = handle_scan_chain_command,
-		.mode = COMMAND_EXEC,
+		.mode = COMMAND_ANY,
 		.help = "print current scan chain configuration",
 	},
 	{