linux-yocto/5.10/cfg: add kcov feature fragment

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

41721be8a03 cfg/debug: add kcov kernel configs

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 6a11ed09)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>