grasshopper: enable generic board

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/include/configs/grasshopper.h b/include/configs/grasshopper.h
index 83f0ed2..54eb977 100644
--- a/include/configs/grasshopper.h
+++ b/include/configs/grasshopper.h
@@ -62,6 +62,10 @@
 #define CONFIG_USART_BASE		ATMEL_BASE_USART1
 #define CONFIG_USART_ID			1
 
+#define CONFIG_SYS_GENERIC_BOARD
+#define CONFIG_BOARD_EARLY_INIT_F
+#define CONFIG_BOARD_EARLY_INIT_R
+
 /* User serviceable stuff */
 #define CONFIG_CMDLINE_TAG
 #define CONFIG_SETUP_MEMORY_TAGS