MIPS: alchemy: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: linux-mips@linux-mips.org
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/arch/mips/alchemy/common/gpiolib.c b/arch/mips/alchemy/common/gpiolib.c
index 84548f7..e6b90e7 100644
--- a/arch/mips/alchemy/common/gpiolib.c
+++ b/arch/mips/alchemy/common/gpiolib.c
@@ -160,14 +160,14 @@
 
 	switch (alchemy_get_cputype()) {
 	case ALCHEMY_CPU_AU1000:
-		ret = gpiochip_add(&alchemy_gpio_chip[0]);
+		ret = gpiochip_add_data(&alchemy_gpio_chip[0], NULL);
 		break;
 	case ALCHEMY_CPU_AU1500...ALCHEMY_CPU_AU1200:
-		ret = gpiochip_add(&alchemy_gpio_chip[0]);
-		ret |= gpiochip_add(&alchemy_gpio_chip[1]);
+		ret = gpiochip_add_data(&alchemy_gpio_chip[0], NULL);
+		ret |= gpiochip_add_data(&alchemy_gpio_chip[1], NULL);
 		break;
 	case ALCHEMY_CPU_AU1300:
-		ret = gpiochip_add(&au1300_gpiochip);
+		ret = gpiochip_add_data(&au1300_gpiochip, NULL);
 		break;
 	}
 	return ret;