mtd: rawnand: Replace of_gpio_named_count() by gpiod_count()

As a preparation to unexport of_gpio_named_count(), convert the
driver to use gpiod_count() instead.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220830183336.49966-1-andriy.shevchenko@linux.intel.com

drivers/mtd/nand/raw/nand_base.c

@@ -5329,11 +5329,10 @@ static int of_get_nand_secure_regions(struct nand_chip *chip)
 int rawnand_dt_parse_gpio_cs(struct device *dev, struct gpio_desc ***cs_array,
 			     unsigned int *ncs_array)
 {
-	struct device_node *np = dev->of_node;
 	struct gpio_desc **descs;
 	int ndescs, i;
 
-	ndescs = of_gpio_named_count(np, "cs-gpios");
+	ndescs = gpiod_count(dev, "cs");
 	if (ndescs < 0) {
 		dev_dbg(dev, "No valid cs-gpios property\n");
 		return 0;