gpio/pinctrl: make gpio_chip members typed boolean

This switches the two members of struct gpio_chip that were
defined as unsigned foo:1 to bool, because that is indeed what
they are. Switch all users in the gpio and pinctrl subsystems
to assign these values with true/false instead of 0/1. The
users outside these subsystems will survive since true/false
is 1/0, atleast we set some kind of more strict typing example.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-bcm2835.c b/drivers/pinctrl/pinctrl-bcm2835.c
index c05c1ef..3d907de 100644
--- a/drivers/pinctrl/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/pinctrl-bcm2835.c
@@ -384,7 +384,7 @@
 	.to_irq = bcm2835_gpio_to_irq,
 	.base = -1,
 	.ngpio = BCM2835_NUM_GPIOS,
-	.can_sleep = 0,
+	.can_sleep = false,
 };
 
 static irqreturn_t bcm2835_gpio_irq_handler(int irq, void *dev_id)