pinctrl: armada-37xx: Use int type to store negative error codes

In armada_37xx_gpio_direction_output(), the 'ret' variable might store
the negative error codes returned by regmap_update_bits(), and in
armada_37xx_edge_both_irq_swap_pol(), the 'ret' variable directly
stores -1, so the type of the 'ret' variable needs to be changed to
int in both cases.

No effect on runtime.

Signed-off-by: Qianfeng Rong <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/mvebu/pinctrl-armada-37xx.c

···
 	struct armada_37xx_pinctrl *info = gpiochip_get_data(chip);
 	unsigned int en_offset = offset;
 	unsigned int reg = OUTPUT_VAL;
-	unsigned int mask, val, ret;
+	unsigned int mask, val;
+	int ret;
 
 	armada_37xx_update_reg(&reg, &offset);
 	mask = BIT(offset);
···
 {
 	u32 reg_idx = pin_idx / GPIO_PER_REG;
 	u32 bit_num = pin_idx % GPIO_PER_REG;
-	u32 p, l, ret;
 	unsigned long flags;
+	u32 p, l;
+	int ret;
 
 	regmap_read(info->regmap, INPUT_VAL + 4*reg_idx, &l);