Refactor header includes to allow kthread.h inclusion in psi_types.h

kthread.h can't be included in psi_types.h because it creates a circular
inclusion with kthread.h eventually including psi_types.h and complaining
on kthread structures not being defined because they are defined further
in the kthread.h. Resolve this by removing psi_types.h inclusion from the
headers included from kthread.h.

Change-Id: I6855e88442bac4abd733c1f0bd5946aabe6ca1cb
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
3 files changed