mm/mmap: fix typo in comment

Replace "parital" with "partial".

Link: https://lkml.kernel.org/r/20230110145353.1658435-1-vernon2gm@gmail.comSigned-off-by: Vernon Yang <vernon2gm@gmail.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/mmap.c

@@ -2889,7 +2889,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
 }
 
 /*
- * brk_munmap() - Unmap a parital vma.
+ * brk_munmap() - Unmap a partial vma.
  * @mas: The maple tree state.
  * @vma: The vma to be modified
  * @newbrk: the start of the address to unmap