staging/rdma/hfi1: Add spaces around binary operators

Add spaces around binary operators.

Fixes checkpatch check:
CHECK: spaces preferred around that 'x'
where x is a binary operator

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/staging/rdma/hfi1/hfi.h b/drivers/staging/rdma/hfi1/hfi.h
index e8c4e56..70decdf4 100644
--- a/drivers/staging/rdma/hfi1/hfi.h
+++ b/drivers/staging/rdma/hfi1/hfi.h
@@ -718,7 +718,7 @@
 	/* begin congestion log related entries
 	 * cc_log_lock protects all congestion log related data */
 	spinlock_t cc_log_lock ____cacheline_aligned_in_smp;
-	u8 threshold_cong_event_map[OPA_MAX_SLS/8];
+	u8 threshold_cong_event_map[OPA_MAX_SLS / 8];
 	u16 threshold_event_counter;
 	struct opa_hfi1_cong_log_event_internal cc_events[OPA_CONG_LOG_ELEMS];
 	int cc_log_idx; /* index for logging events */