This ABI is renamed and moved to a new location /sys/kernel/fadump/registered.

What:		/sys/kernel/fadump_registered
Date:		Feb 2012
Contact:	linuxppc-dev@lists.ozlabs.org
Description:	read/write
		Helps to control the dump collect feature from userspace.
		Setting 1 to this file enables the system to collect the
		dump and 0 to disable it.
User:		Kdump service