arm: at91: convert meesc board to generic board

Signed-off-by: Daniel Gorsulowski <daniel.gorsulowski@esd.eu>
Reviewed-by: Simon Glass <sjg@chromium.org>
[fix corrupt line wraps in patch]
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>

include/configs/meesc.h

@@ -56,6 +56,8 @@
 #define CONFIG_DISPLAY_CPUINFO			/* display cpu info and speed */
 #define CONFIG_PREBOOT				/* enable preboot variable */
 
+#define CONFIG_SYS_GENERIC_BOARD
+
 /*
  * Hardware drivers
  */