southbridge/intel/bd82x6x: Use common gpio.c

Use shared gpio code from common folder.
Bd82x6x's gpio.c and gpio.h is used by other southbridges
as well and will be removed once it is unused.

Change-Id: I8bd981c4696c174152cf41caefa6c083650d283a
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/13614
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/mainboard/lenovo/t520/gpio.c b/src/mainboard/lenovo/t520/gpio.c
index 9412ef9..54f53cf 100644
--- a/src/mainboard/lenovo/t520/gpio.c
+++ b/src/mainboard/lenovo/t520/gpio.c
@@ -16,7 +16,7 @@
 #ifndef T520_GPIO_H
 #define T520_GPIO_H
 
-#include "southbridge/intel/bd82x6x/gpio.h"
+#include <southbridge/intel/common/gpio.h>
 
 const struct pch_gpio_set1 pch_gpio_set1_mode = {
 	.gpio0  = GPIO_MODE_GPIO,   // -USB30_SMI - input