sandbox: Move the bloblist down a little in memory

Move this down by 4KB so that it is large enough to hold the devicetree.

Also fix up the devicetree address in the documetation while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/doc/arch/sandbox/sandbox.rst b/doc/arch/sandbox/sandbox.rst
index a3631de..23902de 100644
--- a/doc/arch/sandbox/sandbox.rst
+++ b/doc/arch/sandbox/sandbox.rst
@@ -614,8 +614,8 @@
 =======   ========================   ===============================
 Addr      Config                     Usage
 =======   ========================   ===============================
-      0   CONFIG_SYS_FDT_LOAD_ADDR   Device tree
-   c000   CONFIG_BLOBLIST_ADDR       Blob list
+    100   CONFIG_SYS_FDT_LOAD_ADDR   Device tree
+   b000   CONFIG_BLOBLIST_ADDR       Blob list
   10000   CFG_MALLOC_F_ADDR          Early memory allocation
   f0000   CONFIG_PRE_CON_BUF_ADDR    Pre-console buffer
  100000   CONFIG_TRACE_EARLY_ADDR    Early trace buffer (if enabled). Also used