pinctrl: Fix spelling mistake "atleast" -> "at least"

There is a spelling mistake in a dev_err message. Fix it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210826123516.14441-1-colin.king@canonical.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>