snapper9260: remove unused AT91_LEGACY

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/include/configs/snapper9260.h b/include/configs/snapper9260.h
index 5436bae..7ef5125 100644
--- a/include/configs/snapper9260.h
+++ b/include/configs/snapper9260.h
@@ -74,7 +74,6 @@
 #define CONFIG_USB_STORAGE
 
 /* GPIOs and IO expander */
-#define CONFIG_AT91_LEGACY
 #define CONFIG_ATMEL_LEGACY
 #define CONFIG_AT91_GPIO
 #define CONFIG_AT91_GPIO_PULLUP		1