devres: simplify devm_kstrdup() using devm_kmemdup()

devm_kstrdup() logic pretty much reflects devm_kmemdup() for strings,
so just reuse it.

Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Link: https://lore.kernel.org/r/20250409105432.1852355-1-raag.jadav@intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>