media: atomisp: add more comments about frame allocation

The frame allocation logic happens differently for userptr
or normal mmap. On a quick look, this sounded to be unbalanced,
but the logic should actually work for both cases.

Add an extra comment to reflect it.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_ioctl.c

@@ -1052,7 +1052,7 @@ int __atomisp_reqbufs(struct file *file, void *fh,
 	atomisp_alloc_css_stat_bufs(asd, stream_id);
 
 	/*
-	 * for user pointer type, buffers are not really allcated here,
+	 * for user pointer type, buffers are not really allocated here,
 	 * buffers are setup in QBUF operation through v4l2_buffer structure
 	 */
 	if (req->memory == V4L2_MEMORY_USERPTR)
@@ -1225,6 +1225,10 @@ static int atomisp_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
 		buf->flags |= V4L2_BUF_FLAG_MAPPED;
 		buf->flags |= V4L2_BUF_FLAG_QUEUED;
 		buf->flags &= ~V4L2_BUF_FLAG_DONE;
+
+		/*
+		 * For mmap, frames were allocated at request buffers
+		 */
 	}
 
 done: