gpio: twl4030: Remove redundant assignment

Variable "status" is never used, so remove it and add warning if
any error happen.

Signed-off-by: Alexander Shiyan <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-twl4030.c

···
 static void twl4030_led_set_value(int led, int value)
 {
 	u8 mask = LEDEN_LEDAON | LEDEN_LEDAPWM;
-	int status;
 
 	if (led)
 		mask <<= 1;
···
 		cached_leden &= ~mask;
 	else
 		cached_leden |= mask;
-	status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden,
-				  TWL4030_LED_LEDEN_REG);
+
+	WARN_ON_ONCE(twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden,
+				      TWL4030_LED_LEDEN_REG));
 }
 
 static int twl4030_set_gpio_direction(int gpio, int is_input)