scsi: dc395x: Documentation: Reword original driver attribution

The Linux kernel isn't in 2.6.x anymore, but rather the major version
has advanced much (currently 6.x). Reword the attribution.

Also, replace 404'ed 2.4 driver link with web.archive.org snapshot [1].

Link: https://web.archive.org/web/20140129181343/http://www.garloff.de/kurt/linux/dc395/

 [1]
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20230510093933.19985-4-bagasdotme@gmail.com


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>