openocd: don't test 'debug_level' directly

Use the macro 'LOG_LEVEL_IS()' to test 'debug_level'.

While there, use the macro 'LOG_LVL_*' in place of the numeric
value.

Skip all riscv code, as it is going to be updated soon from the
external fork.

Change-Id: Icad7e879e040d3b9cf1cc004c433f28725017493
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/9070
Tested-by: jenkins

src/helper/command.c

@@ -69,7 +69,7 @@ extern struct command_context *global_cmd_ctx;
  * Do nothing in case we are not at debug level 3 */
 static void script_debug(Jim_Interp *interp, unsigned int argc, Jim_Obj * const *argv)
 {
-	if (debug_level < LOG_LVL_DEBUG)
+	if (!LOG_LEVEL_IS(LOG_LVL_DEBUG))
 		return;
 
 	char *dbg = alloc_printf("command -");