device-drivers: tbio: rearrange test files

Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
device-drivers: tbio: fixes

Obsolete code updated to the actual kernel BIO API.
User-space program rewritten to use LTP lib.

Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>