pinctrl: samsung: Use unsigned int for number of controller IO mem resources

Number of IO memory resources cannot be negative obviously and the
driver depends silently on this (by iterating from 0 to
nr_ext_resources+1).  Make this requirement explicit.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

drivers/pinctrl/samsung/pinctrl-samsung.c

@@ -960,7 +960,7 @@ samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d,
 	struct samsung_pin_bank *bank;
 	struct resource *res;
 	void __iomem *virt_base[SAMSUNG_PINCTRL_NUM_RESOURCES];
-	int i;
+	unsigned int i;
 
 	id = of_alias_get_id(node, "pinctrl");
 	if (id < 0) {

drivers/pinctrl/samsung/pinctrl-samsung.h

@@ -231,7 +231,7 @@ struct samsung_retention_data {
 struct samsung_pin_ctrl {
 	const struct samsung_pin_bank_data *pin_banks;
 	u32		nr_banks;
-	int		nr_ext_resources;
+	unsigned int	nr_ext_resources;
 	const struct samsung_retention_data *retention_data;
 
 	int		(*eint_gpio_init)(struct samsung_pinctrl_drv_data *);