ARM: Rmobile: Rename CONFIG_RMOBILE to CONFIG_ARCH_RMOBILE

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/board/renesas/koelsch/koelsch.c b/board/renesas/koelsch/koelsch.c
index 51e70e2..b741e2e 100644
--- a/board/renesas/koelsch/koelsch.c
+++ b/board/renesas/koelsch/koelsch.c
@@ -222,7 +222,7 @@
 }
 
 const struct rmobile_sysinfo sysinfo = {
-	CONFIG_RMOBILE_BOARD_STRING
+	CONFIG_ARCH_RMOBILE_BOARD_STRING
 };
 
 void reset_cpu(ulong addr)