dummy_lproc: add back the removed cpu masks

Now they work.

Signed-off-by: Veaceslav Falico <vfalico@gmail.com>
sched: don't change the cpu

It's a nasty bug when, while the cpumask is void, the cpumask_first()
returns something non-zero.

Needs to be addressed later.

Signed-off-by: Veaceslav Falico <vfalico@gmail.com>
dummy_rproc: add noapictimer to AP cmdline

Signed-off-by: Veaceslav Falico <vfalico@gmail.com>