ARM: at91sam9n12ek: convert to generic board support

Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Signed-off-by: NAndreas Bießmann <andreas.devel@googlemail.com>

include/configs/at91sam9n12ek.h

@@ -31,6 +31,7 @@
 #define CONFIG_DISPLAY_CPUINFO
 
 #define CONFIG_OF_LIBFDT
+#define CONFIG_SYS_GENERIC_BOARD
 
 /* general purpose I/O */
 #define CONFIG_AT91_GPIO