mmc: mtk-sd: fix typo

Fix a typo: Fianl -> Final.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Miles Chen <miles.chen@mediatek.com>
Link: https://lore.kernel.org/r/20220530123857.692076-1-fparent@baylibre.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>