pseries: Fix incorrect initialization of interrupt controller

Currently in the reset code for the XICS interrupt controller, we
initialize the pending_priority field to 0 (most favored, by XICS
convention).  This is incorrect, since there is no pending interrupt, it
should be set to least favored - 0xff.  At the moment our XICS
implementation doesn't get hurt by this edge case, but it does confuse the
upcoming kernel XICS implementation.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>

hw/xics.c

diff --git a/hw/xics.c b/hw/xics.c
index 1da3106..edf5833 100644
--- a/hw/xics.c
+++ b/hw/xics.c
@@ -495,7 +495,7 @@
 
     for (i = 0; i < icp->nr_servers; i++) {
         icp->ss[i].xirr = 0;
-        icp->ss[i].pending_priority = 0;
+        icp->ss[i].pending_priority = 0xff;
         icp->ss[i].mfrr = 0xff;
         /* Make all outputs are deasserted */
         qemu_set_irq(icp->ss[i].output, 0);