staging: mt7621-pinctrl: replace uint8_t type with u8 for 'gpio' field

Struct 'rt2880_priv' contains a field 'gpio' which is defined
as uint8_t and should be defined with 'u8' which is preferred.
Update some cast along the code related with this new change.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c

@@ -38,7 +38,7 @@ struct rt2880_priv {
 	const char **group_names;
 	int group_count;
 
-	uint8_t *gpio;
+	u8 *gpio;
 	int max_pins;
 };
 
@@ -343,8 +343,7 @@ static int rt2880_pinmux_pins(struct rt2880_priv *p)
 	}
 
 	/* the buffer that tells us which pins are gpio */
-	p->gpio = devm_kcalloc(p->dev, p->max_pins,
-			       sizeof(uint8_t), GFP_KERNEL);
+	p->gpio = devm_kcalloc(p->dev, p->max_pins, sizeof(u8), GFP_KERNEL);
 	/* the pads needed to tell pinctrl about our pins */
 	p->pads = devm_kcalloc(p->dev, p->max_pins,
 			       sizeof(struct pinctrl_pin_desc), GFP_KERNEL);
@@ -353,7 +352,7 @@ static int rt2880_pinmux_pins(struct rt2880_priv *p)
 		return -ENOMEM;
 	}
 
-	memset(p->gpio, 1, sizeof(uint8_t) * p->max_pins);
+	memset(p->gpio, 1, sizeof(u8) * p->max_pins);
 	for (i = 0; i < p->func_count; i++) {
 		if (!p->func[i]->pin_count)
 			continue;