board: Use CONFIG_XPL_BUILD instead of CONFIG_SPL_BUILD

Use the new symbol to refer to any 'SPL' build, including TPL and VPL

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/toradex/colibri_imx6/do_fuse.c b/board/toradex/colibri_imx6/do_fuse.c
index b404b01..698b05b 100644
--- a/board/toradex/colibri_imx6/do_fuse.c
+++ b/board/toradex/colibri_imx6/do_fuse.c
@@ -7,7 +7,7 @@
  * Helpers for i.MX OTP fusing during module production
 */
 
-#ifndef CONFIG_SPL_BUILD
+#ifndef CONFIG_XPL_BUILD
 #include <command.h>
 #include <console.h>
 #include <fuse.h>
@@ -94,4 +94,4 @@
 	"OTP fusing during module update",
 	"updt_fuse [-n] [-y] - boot cfg fast boot mode fusing"
 );
-#endif /* CONFIG_SPL_BUILD */
+#endif /* CONFIG_XPL_BUILD */