pinctrl/lantiq: fix pin number in ltq_pmx_gpio_request_enable

The mapping logic inside ltq_pmx_gpio_request_enable() was
broken. This only effected Falcon SoC.

Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-lantiq.c b/drivers/pinctrl/pinctrl-lantiq.c
index 7d11072..a703846 100644
--- a/drivers/pinctrl/pinctrl-lantiq.c
+++ b/drivers/pinctrl/pinctrl-lantiq.c
@@ -294,7 +294,7 @@
 				unsigned pin)
 {
 	struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
-	int mfp = match_mfp(info, pin + (range->id * 32));
+	int mfp = match_mfp(info, pin);
 	int pin_func;
 
 	if (mfp < 0) {