gpio: wcove: Unify style of to_reg() with to_ireg()

Use ternary and rename parameter to 'type' in to_reg() to be in
the same style as to_ireg().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/gpio/gpio-wcove.c

@@ -99,19 +99,14 @@ struct wcove_gpio {
 	bool set_irq_mask;
 };
 
-static inline int to_reg(int gpio, enum ctrl_register reg_type)
+static inline int to_reg(int gpio, enum ctrl_register type)
 {
-	unsigned int reg;
+	unsigned int reg = type == CTRL_IN ? GPIO_IN_CTRL_BASE : GPIO_OUT_CTRL_BASE;
 
 	if (gpio >= WCOVE_GPIO_NUM)
 		return -EOPNOTSUPP;
 
-	if (reg_type == CTRL_IN)
-		reg = GPIO_IN_CTRL_BASE + gpio;
-	else
-		reg = GPIO_OUT_CTRL_BASE + gpio;
-
-	return reg;
+	return reg + gpio;
 }
 
 static inline int to_ireg(int gpio, enum ctrl_register type, unsigned int *mask)