fsi: Fix typo in comment

Spelling mistake in comment.

Reported-by: k2ci <kernel-bot@kylinos.cn>
Signed-off-by: Luo Xueqin <luoxueqin@kylinos.cn>
Link: https://lore.kernel.org/r/20220705152757.27843-1-luoxueqin66@gmail.com


Signed-off-by: Joel Stanley <joel@jms.id.au>