boards: adi: max32666fthr: Disable SDHC

Some SDHC related tests fail on CI checks when
rebase adi-main on to Zephyr v4.1 release
candidate.

This commit disables SDHC until the problem is
solved.

Signed-off-by: Yasin Ustuner <Yasin.Ustuner@analog.com>
1 file changed