It looks like upstream chosen to look for arm prefix in uname() rather than listing all possible arm variants. See:
http://git.kernel.org/?p=linux/kernel/git/horms/kexec-tools.git;a=commit;h=5545216da4360d6494cc7ba574e04620a826a332 -- Cyril Hrubis me...@ucw.cz -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org