leds: pwm-multicolor: Use fwnode_get_child_node_count()

Since fwnode_get_child_node_count() was split from its device property
counterpart, we may utilise it in the driver and drop custom implementation.

Signed-off-by: Andy Shevchenko <[e-mail]>
Reviewed-by: Jonathan Cameron <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lee Jones <[e-mail]>

drivers/leds/rgb/leds-pwm-multicolor.c

···
 
 static int led_pwm_mc_probe(struct platform_device *pdev)
 {
-	struct fwnode_handle *mcnode, *fwnode;
+	struct fwnode_handle *mcnode;
 	struct led_init_data init_data = {};
 	struct led_classdev *cdev;
 	struct mc_subled *subled;
 	struct pwm_mc_led *priv;
-	int count = 0;
+	unsigned int count;
 	int ret = 0;
 
 	mcnode = device_get_named_child_node(&pdev->dev, "multi-led");
···
 				     "expected multi-led node\n");
 
 	/* count the nodes inside the multi-led node */
-	fwnode_for_each_child_node(mcnode, fwnode)
-		count++;
+	count = fwnode_get_child_node_count(mcnode);
 
 	priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, count),
 			    GFP_KERNEL);