pinctrl: mediatek: mt8192: Fix compile warnings

After applying patches I get these warnings:

  drivers/pinctrl/mediatek/pinctrl-mt8192.c:1302:56:
  warning: "/*" within comment [-Wcomment]
  drivers/pinctrl/mediatek/pinctrl-mt8192.c:1362:56:
  warning: "/*" within comment [-Wcomment]

Something is wrong with the missing end-slashes. Add them.

Cc: Guodong Liu <guodong.liu@mediatek.com>
Cc: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>