spi: mpc52xx: Replace of_gpio_count() by gpiod_count()

As a preparation to unexport of_gpio_named_count(), convert the
driver to use gpiod_count() instead.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220914153333.37701-1-andriy.shevchenko@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spi-mpc52xx.c

@@ -15,6 +15,7 @@
 #include <linux/of_platform.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
+#include <linux/gpio/consumer.h>
 #include <linux/spi/spi.h>
 #include <linux/io.h>
 #include <linux/of_gpio.h>
@@ -438,7 +439,7 @@ static int mpc52xx_spi_probe(struct platform_device *op)
 	ms->irq1 = irq_of_parse_and_map(op->dev.of_node, 1);
 	ms->state = mpc52xx_spi_fsmstate_idle;
 	ms->ipb_freq = mpc5xxx_get_bus_frequency(&op->dev);
-	ms->gpio_cs_count = of_gpio_count(op->dev.of_node);
+	ms->gpio_cs_count = gpiod_count(&op->dev, NULL);
 	if (ms->gpio_cs_count > 0) {
 		master->num_chipselect = ms->gpio_cs_count;
 		ms->gpio_cs = kmalloc_array(ms->gpio_cs_count,