[IA64] - Fix MAX_PXM_DOMAINS for systems with > 256 nodes

Correctly size the PXM-related arrays for systems that have more than
256 nodes.

Signed-off-by: Jack Steiner <[e-mail]>
Signed-off-by: Tony Luck <[e-mail]>

include/asm-ia64/acpi.h

···
 extern int additional_cpus;
 
 #ifdef CONFIG_ACPI_NUMA
-/* Proximity bitmap length; _PXM is at most 255 (8 bit)*/
-#ifdef CONFIG_IA64_NR_NODES
-#define MAX_PXM_DOMAINS CONFIG_IA64_NR_NODES
+#if MAX_NUMNODES > 256
+#define MAX_PXM_DOMAINS MAX_NUMNODES
 #else
 #define MAX_PXM_DOMAINS (256)
 #endif