MX31: mx31ads: make use of GPIO framework

Signed-off-by: Stefano Babic <sbabic@denx.de>
diff --git a/include/configs/mx31ads.h b/include/configs/mx31ads.h
index 3c61911..adb2ee1 100644
--- a/include/configs/mx31ads.h
+++ b/include/configs/mx31ads.h
@@ -65,6 +65,7 @@
 #define CONFIG_MXC_SPI		1
 #define CONFIG_DEFAULT_SPI_BUS	1
 #define CONFIG_DEFAULT_SPI_MODE	(SPI_MODE_0 | SPI_CS_HIGH)
+#define CONFIG_MXC_GPIO
 
 #define CONFIG_FSL_PMIC
 #define CONFIG_FSL_PMIC_BUS	1