pinctrl: st: st_pinconf_dbg_show wrong format string

function is defined as unsigned int.
So we need %u to print it.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-st.c

@@ -1006,7 +1006,7 @@ static void st_pinconf_dbg_show(struct pinctrl_dev *pctldev,
 
 	function = st_pctl_get_pin_function(pc, offset);
 	if (function)
-		snprintf(f, 10, "Alt Fn %d", function);
+		snprintf(f, 10, "Alt Fn %u", function);
 	else
 		snprintf(f, 5, "GPIO");