ARM: layerscape: ppa: fix error propagation in ppa_init() ...

On fit_open_image, we returned PTR_ERR(fit) instead of the correct ret.
We also didn't call fit_close as we should. Fix this.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/randfixes'

ARM: layerscape: ppa: use sync_for_execution instead of a manual cache flush ...

The copied code is then jumped to, so we need to sync the caches for
execution instead of just flushing the data caches.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: Layerscape: PPA: Disable CAAM JR used by secure firmware ...

JR3 is used by the secure firmware. We have to remove the node from
the Linux device tree to prevent Linux from using it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: Layerscape: Add PPA firmware support ...

The "Primary Protected Application" (PPA) is a PSCI compliant firmware
distributed by NXP. It is needed to start the secondary cores on
Layerscape SoCs. Without it Linux will be started in EL3 and doesn't
work properly. The precompiled firmware images can be found on
https://github.com/NXP/qoriq-ppa-binary and are not included in
barebox.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>