media: verisilicon: Correct a typo in H1_REG_MAD_CTRL_MAD_THRESHOLD

It's a THRESHOLD and not a THREDHOLD.

Link: https://lore.kernel.org/linux-media/20231116154816.70959-3-andrzej.p@collabora.com
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>