mm/vmalloc: fix a typo in comment

There is a typo in comment, fix it.
"exeeds" -> "exceeds"
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200404060136.10838-1-hqjagain@gmail.comSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/vmalloc.c

@@ -3368,7 +3368,7 @@ struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
 			goto overflow;
 
 		/*
-		 * If required width exeeds current VA block, move
+		 * If required width exceeds current VA block, move
 		 * base downwards and then recheck.
 		 */
 		if (base + end > va->va_end) {