pinctrl: samsung: Consistently use unsigned instead of u32 for nr_banks

Unlike for other countable members, the driver used u32 for number of
banks (nr_banks).  There is no specific need for using fixed-width
integer in this particular place.  Make it consistent.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

drivers/pinctrl/samsung/pinctrl-samsung.h

@@ -230,7 +230,7 @@ struct samsung_retention_data {
  */
 struct samsung_pin_ctrl {
 	const struct samsung_pin_bank_data *pin_banks;
-	u32		nr_banks;
+	unsigned int	nr_banks;
 	unsigned int	nr_ext_resources;
 	const struct samsung_retention_data *retention_data;
 
@@ -275,7 +275,7 @@ struct samsung_pinctrl_drv_data {
 	unsigned int			nr_functions;
 
 	struct samsung_pin_bank		*pin_banks;
-	u32				nr_banks;
+	unsigned int			nr_banks;
 	unsigned int			pin_base;
 	unsigned int			nr_pins;