LU-2800 auotconf: remove linux key-type.h test

LU-2800 auotconf: remove linux key-type.h test

Since linux kernel version 2.6.24 key-type.h has
been available so we no longer need to test this.

Signed-off-by: James Simmons <uja.ornl@gmail.com>
Change-Id: I6ed82effb62a0dadabb8477e419c42e8540c91d9
Reviewed-on: http://review.whamcloud.com/5546
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Thomas Stibor <thomas@stibor.net>
Reviewed-by: Andrew Korty <ajk@iu.edu>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>