bloblist: Place on a 4KB boundary

It is much easier to read the bloblist addresses if it starts on a 4KB
boundary. Update it to align it accordingly.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/board_f.c b/common/board_f.c
index 62473ab..e99277d 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -573,7 +573,9 @@
 static int reserve_bloblist(void)
 {
 #ifdef CONFIG_BLOBLIST
-	gd->start_addr_sp = reserve_stack_aligned(CONFIG_BLOBLIST_SIZE);
+	/* Align to a 4KB boundary for easier reading of addresses */
+	gd->start_addr_sp = ALIGN_DOWN(gd->start_addr_sp - CONFIG_BLOBLIST_SIZE,
+				       0x1000);
 	gd->new_bloblist = map_sysmem(gd->start_addr_sp, CONFIG_BLOBLIST_SIZE);
 #endif