arm: rmobile: armadillo800eva: Enable CONFIG_SYS_GENERIC_BOARD

Add CONFIG_SYS_GENERIC_BOARD to use common/board_*.c for armadillo800eva.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
diff --git a/include/configs/armadillo-800eva.h b/include/configs/armadillo-800eva.h
index 17a2da0..8bb932c 100644
--- a/include/configs/armadillo-800eva.h
+++ b/include/configs/armadillo-800eva.h
@@ -48,6 +48,7 @@
 #define CONFIG_USE_ARCH_MEMCPY
 #define CONFIG_TMU_TIMER
 #define CONFIG_SYS_DCACHE_OFF
+#define CONFIG_SYS_GENERIC_BOARD
 
 /* STACK */
 #define CONFIG_SYS_INIT_SP_ADDR		0xE8083000