Masahiro Yamada authored Dec 19, 2016 and Tom Rini committed Dec 27, 2016

These options are now described in the Kconfig help.  We do not want
to maintain duplicated documentation.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Tom Rini <trini@konsulko.com>