RDMA/qib: Fix truncation compilation warnings in qib_init.c

RDMA/qib: Fix truncation compilation warnings in qib_init.c

drivers/infiniband/hw/qib/qib_init.c: In function ‘qib_init_one’:
drivers/infiniband/hw/qib/qib_init.c:586:67: error: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size between 0 and 3 [-Werror=format-truncation=]
  586 |                         snprintf(wq_name, sizeof(wq_name), "qib%d_%d",
      |                                                                   ^~
In function ‘qib_create_workqueues’,
    inlined from ‘qib_init_one’ at drivers/infiniband/hw/qib/qib_init.c:1438:8:
drivers/infiniband/hw/qib/qib_init.c:586:60: note: directive argument in the range [-2147483643, 254]
  586 |                         snprintf(wq_name, sizeof(wq_name), "qib%d_%d",
      |                                                            ^~~~~~~~~~
drivers/infiniband/hw/qib/qib_init.c:586:25: note: ‘snprintf’ output between 7 and 27 bytes into a destination of size 8
  586 |                         snprintf(wq_name, sizeof(wq_name), "qib%d_%d",
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  587 |                                 dd->unit, pidx);
      |                                 ~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Link: https://lore.kernel.org/r/ab5222c414a01e9d2c5129ef26836aace9ee2aa5.1719837715.git.leon@kernel.org
Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>