x86/dom0: propagate guest_physmap_add_page error code

No functional change.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>

xen/arch/x86/hvm/dom0_build.c

@@ -126,7 +126,7 @@ static int __init pvh_populate_memory_range(struct domain *d,
         {
             printk("Failed to populate memory: [%#lx,%#lx): %d\n",
                    start, start + (1UL << order), rc);
-            return -ENOMEM;
+            return rc;
         }
         start += 1UL << order;
         nr_pages -= 1UL << order;