pinctrl: mediatek: fix global-out-of-bounds issue

pinctrl: mediatek: fix global-out-of-bounds issue

This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven.
This ID is fixed in Linux Kernel version v5.10.89 by commit 441d3873664d170982922c5d2fc01fa89d9439ed. For more details please see the references link.