tools/rmmod: return EXIT_FAILURE if kmod_module_new_* fails

In the unlikely case where kmod_module_new_from_{path,name} fails,
rmmod will return success. Change that to EXIT_FAILURE.

Signed-off-by: Emil Velikov <[email protected]>
Link: #138
Signed-off-by: Lucas De Marchi <[email protected]>

tools/rmmod.c

@@ -156,6 +156,7 @@ static int do_rmmod(int argc, char *argv[])
 		if (err < 0) {
 			ERR("could not use module %s: %s\n", arg,
 			    strerror(-err));
+			r = EXIT_FAILURE;
 			break;
 		}