arm:exynos:gpio: fix s5p_gpio_part_max for exynos4x12

This patch fix wrong value returned by 's5p_gpio_part_max' function
for Exynos4412.

Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/arch/arm/include/asm/arch-exynos/gpio.h b/arch/arm/include/asm/arch-exynos/gpio.h
index e955811..a1a7439 100644
--- a/arch/arm/include/asm/arch-exynos/gpio.h
+++ b/arch/arm/include/asm/arch-exynos/gpio.h
@@ -290,10 +290,19 @@
 			return EXYNOS5_GPIO_PART2_MAX;
 
 	} else if (cpu_is_exynos4()) {
-		if (nr < EXYNOS4_GPIO_PART1_MAX)
-			return 0;
-		else
-			return EXYNOS4_GPIO_PART1_MAX;
+		if (proid_is_exynos4412()) {
+			if (nr < EXYNOS4X12_GPIO_PART1_MAX)
+				return 0;
+			else if (nr < EXYNOS4X12_GPIO_PART2_MAX)
+				return EXYNOS4X12_GPIO_PART1_MAX;
+			else
+				return EXYNOS4X12_GPIO_PART2_MAX;
+		} else {
+			if (nr < EXYNOS4_GPIO_PART1_MAX)
+				return 0;
+			else
+				return EXYNOS4_GPIO_PART1_MAX;
+		}
 	}
 
 	return 0;