arm, am33xx: Enable CONFIG_SYS_GENERIC_BOARD for siemens boards

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Tom Rini <trini@ti.com>
Cc: Samuel Egli <samuel.egli@siemens.com>
Cc: Roger Meier <r.meier@siemens.com>
Tested-by: Samuel Egli <samuel.egli@siemens.com>

include/configs/siemens-am33x-common.h

@@ -46,6 +46,8 @@
 #define CONFIG_CMD_ECHO
 #define CONFIG_CMD_CACHE
 
+#define CONFIG_SYS_GENERIC_BOARD
+
 #define CONFIG_ENV_VARS_UBOOT_CONFIG
 #ifndef CONFIG_SPL_BUILD
 #define CONFIG_ROOTPATH		"/opt/eldk"