RDMA/rtrs: Remove (void) casting for functions

Casting to (void) does nothing, remove them.

Link: https://lore.kernel.org/r/20210806112112.124313-7-haris.iqbal@ionos.com


Suggested-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>