dm: exynos: Tidy up GPIO headers

The wrong header is being included, thus requiring the code to re-declare
the generic GPIO interface in each GPIO header.

Fix this.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c
index b929486..2caeb3e 100644
--- a/arch/arm/cpu/armv7/exynos/pinmux.c
+++ b/arch/arm/cpu/armv7/exynos/pinmux.c
@@ -7,7 +7,7 @@
 
 #include <common.h>
 #include <fdtdec.h>
-#include <asm/arch/gpio.h>
+#include <asm/gpio.h>
 #include <asm/arch/pinmux.h>
 #include <asm/arch/sromc.h>
 
diff --git a/arch/arm/include/asm/arch-exynos/gpio.h b/arch/arm/include/asm/arch-exynos/gpio.h
index 8fb5c23..ba169b9 100644
--- a/arch/arm/include/asm/arch-exynos/gpio.h
+++ b/arch/arm/include/asm/arch-exynos/gpio.h
@@ -1504,12 +1504,7 @@
 void gpio_cfg_pin(int gpio, int cfg);
 void gpio_set_pull(int gpio, int mode);
 void gpio_set_drv(int gpio, int mode);
-int gpio_direction_input(unsigned gpio);
-int gpio_direction_output(unsigned gpio, int value);
-int gpio_set_value(unsigned gpio, int value);
-int gpio_get_value(unsigned gpio);
 void gpio_set_rate(int gpio, int mode);
-struct s5p_gpio_bank *s5p_gpio_get_bank(unsigned gpio);
 int s5p_gpio_get_pin(unsigned gpio);
 #endif
 
diff --git a/arch/arm/include/asm/arch-s5pc1xx/gpio.h b/arch/arm/include/asm/arch-s5pc1xx/gpio.h
index d5dbc22..bd6f2d2 100644
--- a/arch/arm/include/asm/arch-s5pc1xx/gpio.h
+++ b/arch/arm/include/asm/arch-s5pc1xx/gpio.h
@@ -815,11 +815,7 @@
 void gpio_cfg_pin(int gpio, int cfg);
 void gpio_set_pull(int gpio, int mode);
 void gpio_set_drv(int gpio, int mode);
-int gpio_direction_output(unsigned gpio, int value);
-int gpio_set_value(unsigned gpio, int value);
-int gpio_get_value(unsigned gpio);
 void gpio_set_rate(int gpio, int mode);
-struct s5p_gpio_bank *s5p_gpio_get_bank(unsigned gpio);
 int s5p_gpio_get_pin(unsigned gpio);
 
 /* GPIO pins per bank  */