ppc/pnv/pci: Fix PHB xscom registers memory region name

The name is for the region mapping the PHB xscom registers. It was
apparently a bad cut-and-paste from the per-stack pci xscom area just
above, so we had two regions with the same name.

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20230127122848.550083-5-fbarrat@linux.ibm.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

hw/pci-host/pnv_phb4.c

@@ -1497,7 +1497,7 @@ static void pnv_phb4_xscom_realize(PnvPHB4 *phb)
                           PHB4_PEC_PCI_STK_REGS_COUNT);
 
     /* PHB pass-through */
-    snprintf(name, sizeof(name), "xscom-pec-%d.%d-pci-phb-%d",
+    snprintf(name, sizeof(name), "xscom-pec-%d.%d-phb-%d",
              pec->chip_id, pec->index, stack_no);
     pnv_xscom_region_init(&phb->phb_regs_mr, OBJECT(phb),
                           &pnv_phb4_xscom_ops, phb, name, 0x40);