pinctrl: restore pin naming

Commit ca53c5f1
("pinctrl: conjure names for unnamed pins") made pins lose
their identity and only get autogenerated names.
Acked-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/core.c

@@ -189,7 +189,7 @@ static int pinctrl_register_one_pin(struct pinctrl_dev *pctldev,
 	pindesc->pctldev = pctldev;
 
 	/* Copy basic pin info */
-	if (pindesc->name) {
+	if (name) {
 		pindesc->name = name;
 	} else {
 		pindesc->name = kasprintf(GFP_KERNEL, "PIN%u", number);