ARM: SAMSUNG: Cleanup GPIOlib adding 2bit chips

This patch adds samsung_gpiolib_add_2bit_chips() for cleanup regarding
GPIOlib adding 2bit chips.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/plat-samsung/gpiolib.c b/arch/arm/plat-samsung/gpiolib.c
index c354089..ea37c04 100644
--- a/arch/arm/plat-samsung/gpiolib.c
+++ b/arch/arm/plat-samsung/gpiolib.c
@@ -197,3 +197,10 @@
 		s3c_gpiolib_add(chip);
 	}
 }
+
+void __init samsung_gpiolib_add_2bit_chips(struct s3c_gpio_chip *chip,
+					   int nr_chips)
+{
+	for (; nr_chips > 0; nr_chips--, chip++)
+		s3c_gpiolib_add(chip);
+}