sw64: fix compile error for DISCONTIGMEM=y

Sunway inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I56QAM

--------------------------------

This option hasn't been tested for a while, and it throws compile
errors because the required include header file is missing.
Signed-off-by: NHe Sheng <hesheng@wxiat.com>
Signed-off-by: NGu Zitao <guzitao@wxiat.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/sw_64/include/asm/numa.h

@@ -4,6 +4,7 @@
 #define _ASM_SW64_NUMA_H
 
 #include <linux/nodemask.h>
+#include <asm/memory.h>
 
 #ifdef CONFIG_NUMA
 extern nodemask_t numa_nodes_parsed __initdata;