global_data: Enable spl_handoff only if CONFIG_HANDOFF is set

spl_handoff should only be enabled when CONFIG_HANDOFF is set. Drop the
nested ifdefs and check for CONFIG_HANDOFF instead.
Signed-off-by: NOvidiu Panait <ovidiu.panait@windriver.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

include/asm-generic/global_data.h

@@ -412,12 +412,12 @@ struct global_data {
 	 * @new_bloblist: relocated blob list information
 	 */
 	struct bloblist_hdr *new_bloblist;
-# ifdef CONFIG_SPL
+#endif
+#if CONFIG_IS_ENABLED(HANDOFF)
 	/**
 	 * @spl_handoff: SPL hand-off information
 	 */
 	struct spl_handoff *spl_handoff;
-# endif
 #endif
 #if defined(CONFIG_TRANSLATION_OFFSET)
 	/**