platform/x86: hp-bioscfg: Replace deprecated strncpy() with strscpy()

platform/x86: hp-bioscfg: Replace deprecated strncpy() with strscpy()

Since kstrtol() requires a NUL-terminated string as input and strncpy()
is deprecated for NUL-terminated destination buffers, use strscpy()
instead.

Compile-tested only.

Link: https://github.com/KSPP/linux/issues/90
Cc: linux-hardening@vger.kernel.org
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://lore.kernel.org/r/20250225232126.356274-2-thorsten.blum@linux.dev
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>