fix parse_affinity for CPU numbers greater than 31

The function parse_affinity reports wrong results for CPU numbers
greater than 31.

The problem is caused by the function bitmastlist which parse_affinity
calls. The fix treats the inpput line as a long hexbitmask instead of an
array in order to produce correct results

Signed-off-by: Jozef Bacik <jobacik@redhat.com>
Signed-off-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Jiri Kastner <jkastner@redhat.com>