kirkwood: sheevaplug: add FDT support

LIBFDT feature is required to support new kernels.

Signed-off-by: GĂ©rald Kerma <drEagle@doukki.net>
Reviewed-by: Luka Perkov <luka.perkov@sartura.hr>
diff --git a/include/configs/sheevaplug.h b/include/configs/sheevaplug.h
index 589655a..84029cb 100644
--- a/include/configs/sheevaplug.h
+++ b/include/configs/sheevaplug.h
@@ -33,6 +33,11 @@
 #define CONFIG_LZO
 
 /*
+ * Enable device tree support
+ */
+#define CONFIG_OF_LIBFDT
+
+/*
  * Miscellaneous configurable options
  */
 #define CONFIG_SYS_HUSH_PARSER		/* use "hush" command parser */