pinctrl: rzn1: Fix of_get_child_count() error check

If we assign the result of of_get_child_count() to an unsigned int,
the code will not detect any errors. Therefore assign it to an int
instead.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

drivers/pinctrl/pinctrl-rzn1.c

@@ -810,8 +810,8 @@ static int rzn1_pinctrl_probe_dt(struct platform_device *pdev,
 	struct device_node *np = pdev->dev.of_node;
 	struct device_node *child;
 	unsigned int maxgroups = 0;
-	unsigned int nfuncs = 0;
 	unsigned int i = 0;
+	int nfuncs = 0;
 	int ret;
 
 	nfuncs = of_get_child_count(np);