pwm: Add can_sleep property to drivers

Calls to PWM drivers connected through I2C can sleep.
Use the new can_sleep property.
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>

drivers/pwm/pwm-twl-led.c

@@ -300,6 +300,7 @@ static int twl_pwmled_probe(struct platform_device *pdev)
 
 	twl->chip.dev = &pdev->dev;
 	twl->chip.base = -1;
+	twl->chip.can_sleep = true;
 
 	mutex_init(&twl->mutex);
 

drivers/pwm/pwm-twl.c

@@ -315,6 +315,7 @@ static int twl_pwm_probe(struct platform_device *pdev)
 	twl->chip.dev = &pdev->dev;
 	twl->chip.base = -1;
 	twl->chip.npwm = 2;
+	twl->chip.can_sleep = true;
 
 	mutex_init(&twl->mutex);