pwm: bcm2835: Drop write-only member of driver private data

Since commit fcc76072 ("pwm: bcm2835: Allow PWM driver to be used in
atomic context") struct bcm2835_pwm::dev is only assigned a value, but
it's never used. So the dev member can just be dropped.

Link: https://lore.kernel.org/r/20240129081029.2355612-2-u.kleine-koenig@pengutronix.deSigned-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

drivers/pwm/pwm-bcm2835.c

@@ -25,7 +25,6 @@
 
 struct bcm2835_pwm {
 	struct pwm_chip chip;
-	struct device *dev;
 	void __iomem *base;
 	struct clk *clk;
 	unsigned long rate;
@@ -142,8 +141,6 @@ static int bcm2835_pwm_probe(struct platform_device *pdev)
 	if (!pc)
 		return -ENOMEM;
 
-	pc->dev = &pdev->dev;
-
 	pc->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(pc->base))
 		return PTR_ERR(pc->base);