RDMA/core: Fix kernel doc warnings for ib_port_immutable_read()

drivers/infiniband/core/device.c:859: warning: Function parameter or member 'dev' not described in 'ib_port_immutable_read'
drivers/infiniband/core/device.c:859: warning: Function parameter or member 'port' not described in 'ib_port_immutable_read'

Fixes: 7416790 ("RDMA/core: Introduce and use API to read port immutable data")
Link: https://lore.kernel.org/r/20210210151421.1108809-1-leon@kernel.org
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/core/device.c

@@ -850,9 +850,9 @@ static int setup_port_data(struct ib_device *device)
 
 /**
  * ib_port_immutable_read() - Read rdma port's immutable data
- * @dev - IB device
- * @port - port number whose immutable data to read. It starts with index 1 and
- *         valid upto including rdma_end_port().
+ * @dev: IB device
+ * @port: port number whose immutable data to read. It starts with index 1 and
+ *        valid upto including rdma_end_port().
  */
 const struct ib_port_immutable*
 ib_port_immutable_read(struct ib_device *dev, unsigned int port)