misc: ocxl: link: Remove unnecessary (void*) conversions

The link pointer does not need to cast the type.

Signed-off-by: Li zeming <zeming@nfschina.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Acked-by: Andrew Donnellan <ajd@linux.ibm.com>
Link: https://lore.kernel.org/r/20231113014533.11064-1-zeming@nfschina.com


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