arm: include config.h in arch/arm/lib/vectors.S

config.h is required for CONFIG_SYS_DV_NOR_BOOT_CFG.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Reported-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>

arch/arm/lib/vectors.S

@@ -13,6 +13,8 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
+#include <config.h>
+
 /*
  *************************************************************************
  *