pinctrl: fix pinconf_pins_show iteration

Commit 706e852 "pinctrl: correct a offset while enumerating pins"
modified the variable used by pinconf_pin_show()'s for loop, but didn't
update the for loop test expression.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinconf.c

@@ -236,7 +236,7 @@ static int pinconf_pins_show(struct seq_file *s, void *what)
 	seq_puts(s, "Format: pin (name): pinmux setting array\n");
 
 	/* The pin number can be retrived from the pin controller descriptor */
-	for (i = 0; pin < pctldev->desc->npins; i++) {
+	for (i = 0; i < pctldev->desc->npins; i++) {
 		struct pin_desc *desc;
 
 		pin = pctldev->desc->pins[i].number;