linux-yocto/6.6: fix kselftest failures

Integrating the following commit(s) to linux-yocto/6.6:

1/1 [
    Author: Mark Brown
    Email: broonie@kernel.org
    Subject: kselftest: Add a ksft_perror() helper
    Date: Thu, 28 Sep 2023 16:38:11 +0200

    The standard library perror() function provides a convenient way to print
    an error message based on the current errno but this doesn't play nicely
    with KTAP output. Provide a helper which does an equivalent thing in a KTAP
    compatible format.

    nolibc doesn't have a strerror() and adding the table of strings required
    doesn't seem like a good fit for what it's trying to do so when we're using
    that only print the errno.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
]

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 3d747dab)
Signed-off-by: Steve Sakoman <steve@sakoman.com>