[S390] zcrypt: Fix check to look for facility bits 2 & 65

Fix the check for ap interupts to look for facility bits 2 and 65.
Make sure that we only register interrupts for aps, if the machine
has ap interrupt support.

This patch is relevant only for the 2.6.37 stable series.

Cc: stable@kernel.org
Signed-off-by: Felix Beck <felix.beck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>