[PATCH] udevinfo patch

I think this is what you want for udevinfo. Patched against the latest BK
tree. I tested it and it seemed to work.

One other question, shouldn't udevinfo.c:print_all_attributes() check to
make sure attr->method is SYSFS_METHOD_SHOW along with checking to see
if attr->value != NULL or doesn't that matter?

Here's the libsysfs fix for print_device_chain():