bloblist: Drop spare value from bloblist record

Drop spare value from bloblist record header.

For now it is still present in the header, with an underscore, so that
tests continue to pass.

Signed-off-by: Simon Glass <sjg@chromium.org>
Co-developed-by: Raymond Mao <raymond.mao@linaro.org>
Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
diff --git a/common/bloblist.c b/common/bloblist.c
index 168993e..88e2a0f 100644
--- a/common/bloblist.c
+++ b/common/bloblist.c
@@ -165,7 +165,6 @@
 	rec->tag = tag;
 	rec->hdr_size = data_start - hdr->alloced;
 	rec->size = size;
-	rec->spare = 0;
 
 	/* Zero the record data */
 	memset((void *)rec + rec_hdr_size(rec), '\0', rec->size);
diff --git a/include/bloblist.h b/include/bloblist.h
index 7eff709..68f9739 100644
--- a/include/bloblist.h
+++ b/include/bloblist.h
@@ -205,13 +205,12 @@
  *	record's data starts at this offset from the start of the record
  * @size: Size of record in bytes, excluding the header size. This does not
  *	need to be aligned (e.g. 3 is OK).
- * @spare: Spare space for other things
  */
 struct bloblist_rec {
 	u32 tag;
 	u32 hdr_size;
 	u32 size;
-	u32 spare;
+	u32 _spare;
 };
 
 /**