RDMA/hw/hfi1/msix: Add description for 'name' and remove superfluous param 'idx'

Fixes the following W=1 kernel build warning(s):

 drivers/infiniband/hw/hfi1/msix.c:120: warning: Function parameter or member 'name' not described in 'msix_request_irq'
 drivers/infiniband/hw/hfi1/msix.c:120: warning: Excess function parameter 'idx' description in 'msix_request_irq'

Link: https://lore.kernel.org/r/20210126124732.3320971-6-lee.jones@linaro.org
Cc: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
Cc: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: linux-rdma@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/hfi1/msix.c

@@ -103,8 +103,8 @@ int msix_initialize(struct hfi1_devdata *dd)
  * @arg: context information for the IRQ
  * @handler: IRQ handler
  * @thread: IRQ thread handler (could be NULL)
- * @idx: zero base idx if multiple devices are needed
  * @type: affinty IRQ type
+ * @name: IRQ name
  *
  * Allocated an MSIx vector if available, and then create the appropriate
  * meta data needed to keep track of the pci IRQ request.