psi: Remove PSIHB_XIVR reference

The define for PSIHB_XIVR was removed with P7 support.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Reza Arbab <arbab@linux.ibm.com>
diff --git a/hw/psi.c b/hw/psi.c
index de074ce..aa7e020 100644
--- a/hw/psi.c
+++ b/hw/psi.c
@@ -879,8 +879,6 @@
 	       in_be64(psi->regs + PSIHB_CR));
 	printf("  PSIHB_SEMR   : %llx\n",
 	       in_be64(psi->regs + PSIHB_SEMR));
-	printf("  PSIHB_XIVR   : %llx\n",
-	       in_be64(psi->regs + PSIHB_XIVR));
 #endif
 }