pinctrl: pinctrl-at91.c: Cleaning up values that are never used

Remove variable that are never used

This was found using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-at91.c

@@ -772,9 +772,9 @@ static void at91_pinconf_dbg_show(struct pinctrl_dev *pctldev,
 				   struct seq_file *s, unsigned pin_id)
 {
 	unsigned long config;
-	int ret, val, num_conf = 0;
+	int val, num_conf = 0;
 
-	ret = at91_pinconf_get(pctldev, pin_id, &config);
+	at91_pinconf_get(pctldev, pin_id, &config);
 
 	DBG_SHOW_FLAG(MULTI_DRIVE);
 	DBG_SHOW_FLAG(PULL_UP);