The sed expression was also replacing documentation text containing
PermitRootLogin in the line so "PermitRootLogin yes" was specified
twice.
(From OE-Core rev: 0572196158d9505a624bdee71760978f284728b0)
Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>