PIP405: convert to generic board

Signed-off-by: David Müller <d.mueller@elsoft.ch>
diff --git a/include/configs/PIP405.h b/include/configs/PIP405.h
index a6f505a..9a1b2ac 100644
--- a/include/configs/PIP405.h
+++ b/include/configs/PIP405.h
@@ -21,6 +21,8 @@
 
 #define	CONFIG_SYS_TEXT_BASE	0xFFF80000
 
+#define CONFIG_SYS_GENERIC_BOARD
+
 /***********************************************************
  * Clock
  ***********************************************************/