Documentation: Fixes a term's translation in Documentation/zh_CN/arm64/memory.txt

Fixes a term's translation in Documentation/zh_CN/arm64/memory.txt The modification is based on Catalin Marinas <[email protected]>'s suggestion:
"memory" in "ffffffc000000000 ffffffffffffffff 256GB memory" should be treated as "kernel logical memory map",
so the translation should be "内核逻辑内存映射".

---
 Documentation/zh_CN/arm64/memory.txt |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 83b5193..2a74499 100644
@@ -61,7 +61,7 @@ ffffffbe00000000	ffffffbffbffffff	  ~8GB		[防护页，未来用于 vmmemap]
 
 ffffffbffc000000	ffffffbfffffffff	  64MB		模块
 
-ffffffc000000000	ffffffffffffffff	 256GB		内存空间
+ffffffc000000000	ffffffffffffffff	 256GB		内核逻辑内存映射
 
 
 4KB 页大小的转换表查找：

1.7.9.5