arm64/numa: Fix a typo in comment of arm64_numa_init

Fix a typo in comment of arm64_numa_init. 'encomapssing' should
be 'encompassing'.
Signed-off-by: Yanfei Xu <yanfei.xu@windriver.com>
Link: https://lore.kernel.org/r/20200901091154.10112-1-yanfei.xu@windriver.comSigned-off-by: Will Deacon <will@kernel.org>

arch/arm64/mm/numa.c

@@ -448,7 +448,7 @@ static int __init dummy_numa_init(void)
  * arm64_numa_init() - Initialize NUMA
  *
  * Try each configured NUMA initialization method until one succeeds. The
- * last fallback is dummy single node config encomapssing whole memory.
+ * last fallback is dummy single node config encompassing whole memory.
  */
 void __init arm64_numa_init(void)
 {