Use ColdFire FSI interface on Palmetto (P8)

Moves Palmetto to use the kernel API, and the ColdFire master driver.
This change bumps the kernel (with device tree changes) and the skeleton
repository for a corresponding op-hostctl (host_control.exe) change.

Palmetto is the only system in the tree using this code. Any out of tree
systems (such as other P8s) must switch to using the kernel interface as
well.

Skeleton changes:

Joel Stanley (1):
      hostctl: Move to kernel FSI interface

Linux changes:

Benjamin Herrenschmidt (2):
      ARM: dts: aspeed: Add Power8 CFAM description for use by Palmetto
      ARM: dts: aspeed: Palmetto system can use coprocessor for FSI

Change-Id: I43aada22c9d7b21dc24bd5aae3c4dcb77bdaaa8f
Signed-off-by: Joel Stanley <joel@jms.id.au>