target/riscv: fix checking of number of parameters

in command 'riscv resume_order' to prevent segfault
on issuing the command without a parameter.

Change-Id: I5d7f4f92c2fa8e9effaba2c000d111e491b7b64f
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: https://review.openocd.org/c/openocd/+/9132
Tested-by: jenkins

src/target/riscv/riscv.c

@@ -4825,7 +4825,7 @@ COMMAND_HANDLER(riscv_set_ir)
 
 COMMAND_HANDLER(riscv_resume_order)
 {
-	if (CMD_ARGC > 1)
+	if (CMD_ARGC != 1)
 		return ERROR_COMMAND_SYNTAX_ERROR;
 
 	if (!strcmp(CMD_ARGV[0], "normal")) {