pinctrl: ocelot: Remove unnecessary conversion to bool

Fix the following coccicheck warning:

./drivers/pinctrl/pinctrl-ocelot.c:732:28-33: WARNING: conversion to bool not needed here
Reported-by: Tosk Robot <tencent_os_robot@tencent.com>
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Link: https://lore.kernel.org/r/1604651795-1220-1-git-send-email-kaixuxia@tencent.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-ocelot.c

@@ -729,7 +729,7 @@ static int ocelot_pinconf_get(struct pinctrl_dev *pctldev,
 		if (err)
 			return err;
 		if (param == PIN_CONFIG_BIAS_DISABLE)
-			val = (val == 0 ? true : false);
+			val = (val == 0);
 		else if (param == PIN_CONFIG_BIAS_PULL_DOWN)
 			val = (val & BIAS_PD_BIT ? true : false);
 		else    /* PIN_CONFIG_BIAS_PULL_UP */