When building U-Boot we select the architecture via Kconfig and not ARCH
being passed in via the environment or make cmdline.
While in here, add the doc file to the MAINTAINERS entry for coldfire.
Cc: Huan Wang <alison.wang@nxp.com>
Cc: Angelo Dureghello <angelo@sysam.it>
Signed-off-by: Tom Rini <trini@konsulko.com>
Convert plain text documentation to reStructuredText format and add
it to Sphinx TOC tree. No essential content change.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>