IB/isert: Remove unneeded new lines

The Linux convention is to have only 1 new line between functions.

Link: https://lore.kernel.org/r/20210110111903.486681-1-mgurtovoy@nvidia.com


Reviewed-by: Israel Rukshin <israelr@nvidia.com>
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>