[U-Boot] [PATCH 11/25] spl: Support bootstage, log, hash and early malloc in TPL

[sjg at google.com]

At present these features are supported in SPL but not TPL. Update the
Kconfig and Makefile to allow this.

Also add a few Makefile comments to make earier to track what is going on.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 common/Kconfig  | 35 +++++++++++++++++++++++++++++++++++
 common/Makefile | 10 +++++++---
 2 files changed, 42 insertions(+), 3 deletions(-)

Applied to u-boot-dm/master, thanks!