pinctrl: tegra: Fix off by one in tegra_pinctrl_get_group()

This should be >= pmx->soc->ngroups instead of > to avoid an out of
bounds access.  The pmx->soc->groups[] array is allocated in
tegra_pinctrl_probe().

Fixes: c12bfa0 ("pinctrl-tegra: Restore SFSEL bit when freeing pins")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Kunwu Chan <kunwu.chan@linux.dev>
Link: https://lore.kernel.org/82b40d9d-b437-42a9-9eb3-2328aa6877ac@stanley.mountain
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Dan Carpenter

drivers/pinctrl/tegra/pinctrl-tegra.c

@@ -306,7 +306,7 @@ static const struct tegra_pingroup *tegra_pinctrl_get_group(struct pinctrl_dev *
 {
 	struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 
-	if (group_index < 0 || group_index > pmx->soc->ngroups)
+	if (group_index < 0 || group_index >= pmx->soc->ngroups)
 		return NULL;
 
 	return &pmx->soc->groups[group_index];