pinctrl: tegra-xusb: fix an off by one test

This shoudld be ">= ARRAY_SIZE()" instead of "> ARRAY_SIZE()".

Fixes: dc0a3938

 ('pinctrl: Add NVIDIA Tegra XUSB pad controller support')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>