warnings: use more 'const' for char *

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

src/target/etm.h

@@ -139,7 +139,7 @@ struct etm_context;
 
 struct etm_capture_driver
 {
-	char *name;
+	const char *name;
 	const struct command_registration *commands;
 	int (*init)(struct etm_context *etm_ctx);
 	trace_status_t (*status)(struct etm_context *etm_ctx);