pseries: Update SLOF firmware image
This patch updates the SLOF submodule and precompiled image. The new
SLOF versions contains two changes of note:
* The previous SLOF has a bug in SCSI condition handling that was
exposed by recent updates to qemu's SCSI emulation. This update
fixes the bug.
* The previous SLOF has a bug in its addressing of SCSI devices,
which can be exposed under certain conditions. The new SLOF also
fixes this.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>