xen: arm: stub out domain_get_maximum_gpfn

It currently has no callers, so return ENOSYS until such a time as one
arrives.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Tim Deegan <tim@xen.org>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

xen/arch/arm/dummy.S

@@ -10,7 +10,6 @@ x:	mov pc, lr
 DUMMY(nr_irqs_gsi);
 
 /* Other */
-DUMMY(domain_get_maximum_gpfn);
 DUMMY(domain_relinquish_resources);
 DUMMY(dom_cow);
 DUMMY(send_timer_event);

xen/arch/arm/mm.c

@@ -447,6 +447,11 @@ int page_is_ram_type(unsigned long mfn, unsigned long mem_type)
     return 0;
 }
 
+unsigned long domain_get_maximum_gpfn(struct domain *d)
+{
+    return -ENOSYS;
+}
+
 void share_xen_page_with_guest(struct page_info *page,
                           struct domain *d, int readonly)
 {