VCMA9: convert to generic board

Signed-off-by: David Müller <d.mueller@elsoft.ch>
diff --git a/include/configs/VCMA9.h b/include/configs/VCMA9.h
index d40185e..0d8a13c 100644
--- a/include/configs/VCMA9.h
+++ b/include/configs/VCMA9.h
@@ -28,6 +28,8 @@
 
 #define CONFIG_SYS_TEXT_BASE	0x0
 
+#define CONFIG_SYS_GENERIC_BOARD
+
 #define CONFIG_SYS_ARM_CACHE_WRITETHROUGH
 
 /* input clock of PLL (VCMA9 has 12MHz input clock) */