global_data: Drop spl_handoff

Provide a function to locate this information, rather than doing it
automatically on startup, to save space in global_data.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/init/handoff.c b/common/init/handoff.c
index a7cd065..86c020e 100644
--- a/common/init/handoff.c
+++ b/common/init/handoff.c
@@ -5,6 +5,7 @@
  * Copyright 2018 Google, Inc
  */
 
+#include <bloblist.h>
 #include <handoff.h>
 #include <asm/global_data.h>
 
@@ -38,3 +39,14 @@
 		bd->bi_dram[i].size = ho->ram_bank[i].size;
 	}
 }
+
+struct spl_handoff *handoff_get(void)
+{
+	struct spl_handoff *handoff;
+
+	handoff = bloblist_find(BLOBLISTT_U_BOOT_SPL_HANDOFF,
+				sizeof(struct spl_handoff));
+	debug("Found SPL hand-off info %p\n", handoff);
+
+	return handoff;
+}