Remove the deprecated CONFIG_OF_FLAT_TREE

Use CONFIG_OF_LIBFDT instead to support flattened device trees.  It is
cleaner, has better functionality, and is better supported.

Signed-off-by: Gerald Van Baren <vanbaren@cideas.com>
diff --git a/include/configs/mpc7448hpc2.h b/include/configs/mpc7448hpc2.h
index 3d71e22..2f24967 100644
--- a/include/configs/mpc7448hpc2.h
+++ b/include/configs/mpc7448hpc2.h
@@ -58,6 +58,7 @@
 #define CONFIG_BOARD_EARLY_INIT_R
 #define CONFIG_MISC_INIT_R
 
+#define CONFIG_HAS_ETH0
 #define CONFIG_HAS_ETH1
 
 #define CONFIG_ENV_OVERWRITE