kconfig-language: add to hints

limits FOO to module (=m) or disabled (=n).

limits FOO to module (=m) or disabled (=n).

Kconfig symbol existence

~~~~~~~~~~~~~~~~~~~~~~~~

The following two methods produce the same kconfig symbol dependencies

but differ greatly in kconfig symbol existence (production) in the

generated config file.

case 1:

config FOO

	tristate "about foo"

	depends on BAR

vs. case 2:

if BAR

config FOO

	tristate "about foo"

endif

In case 1, the symbol FOO will always exist in the config file (given

no other dependencies).  In case 2, the symbol FOO will only exist in

the config file if BAR is enabled.