Using CONFIG_IA64_HP_ZX1 on an sx1000 system setup w/ multiple NUMA

nodes (configured for cell local memory) currently crashes because
MAX_NUMNODES defaults to 1.  The patch below sets up things to make this
work.
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/Kconfig

@@ -170,7 +170,7 @@ config VIRTUAL_MEM_MAP
 
 config DISCONTIGMEM
 	bool "Discontiguous memory support"
-	depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC) && NUMA && VIRTUAL_MEM_MAP
+	depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1) && NUMA && VIRTUAL_MEM_MAP
 	default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
 	help
 	  Say Y to support efficient handling of discontiguous physical memory,

include/asm-ia64/numnodes.h

@@ -4,6 +4,9 @@
 #ifdef CONFIG_IA64_DIG
 /* Max 8 Nodes */
 #define NODES_SHIFT	3
+#elif defined(CONFIG_IA64_HP_ZX1)
+/* Max 32 Nodes */
+#define NODES_SHIFT	5
 #elif defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 /* Max 256 Nodes */
 #define NODES_SHIFT	8