sparc64: Make NUMA depend upon SMP.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/Kconfig

@@ -231,6 +231,7 @@ endmenu
 
 config NUMA
 	bool "NUMA support"
+	depends on SMP
 
 config NODES_SHIFT
 	int