target-ppc: Implement IVOR[59] By Default for Book E

Adjust the IVOR mask for generic Book E implementation to support bit 59.
This is consistent with the Power ISA.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Reported-by: Pierre Mallard <mallard.pierre@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 0530b0b..9a2e788 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -2786,7 +2786,7 @@
     env->excp_vectors[POWERPC_EXCP_DTLB]     = 0x00000000;
     env->excp_vectors[POWERPC_EXCP_ITLB]     = 0x00000000;
     env->excp_vectors[POWERPC_EXCP_DEBUG]    = 0x00000000;
-    env->ivor_mask = 0x0000FFE0UL;
+    env->ivor_mask = 0x0000FFF0UL;
     env->ivpr_mask = 0xFFFF0000UL;
     /* Hardware reset vector */
     env->hreset_vector = 0xFFFFFFFCUL;