sandbox: Adjust the bloblist default address

Move this down to provide more space for the bloblist.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/Kconfig b/common/Kconfig
index 26496f9..1f0c366 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -724,7 +724,7 @@
 config BLOBLIST_ADDR
 	hex "Address of bloblist"
 	depends on BLOBLIST
-	default 0xe000 if SANDBOX
+	default 0xc000 if SANDBOX
 	help
 	  Sets the address of the bloblist, set up by the first part of U-Boot
 	  which runs. Subsequent U-Boot stages typically use the same address.