Commit 50958bcdac ("linux: Add support for custom license files") added a
default value for the license files and made the option visible (E.G.
editable) when a custom VCS or tarball version is used, but it is also
needed for users of an older _CUSTOM_VERSION (E.G. mainline release), as
the referenced files were only added in Linux 4.16 with commit e00a844aca
("LICENSES: Add Linux syscall note exception"), so change that.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>