interrupts: also parse default_smp_affinity
interrupts: also parse default_smp_affinity

Signed-off-by: Davide Cavalca <57b6bba554e5c9f62dbaf7411a445cfa402496c7@fb.com>

chef/ohai,mattray/ohai,mattray/ohai,jaymzh/ohai,chef/ohai,jaymzh/ohai