[IA64] Allow ia64 to CONFIG_NR_CPUS up to 4096

ia64 has compiled with NR_CPUS=4096 for a couple releases, just forgot
to update Kconfig to allow it.
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/Kconfig

@@ -321,10 +321,10 @@ config SMP
 	  If you don't know what to do here, say N.
 
 config NR_CPUS
-	int "Maximum number of CPUs (2-1024)"
-	range 2 1024
+	int "Maximum number of CPUs (2-4096)"
+	range 2 4096
 	depends on SMP
-	default "1024"
+	default "4096"
 	help
 	  You should set this to the number of CPUs in your system, but
 	  keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but