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nlplug-findfs: increase the /sys recursion limit

certain platform and usb devices expose things deep down the tree,
increase the recursion limit

--- a/nlplug-findfs.c

+++ b/nlplug-findfs.c

@@ -805,9 +805,9 @@

 	};

 	char path[PATH_MAX] = "/sys/bus";

-	recurse_dir(path, &opts, 8);

+	recurse_dir(path, &opts, 64);

 	strcpy(path, "/sys/devices");

-	recurse_dir(path, &opts, 8);

+	recurse_dir(path, &opts, 64);

 	write(fd, &ok, sizeof(ok));

 	return NULL;

 }