IB/mthca: Use non-atomic bitmap functions when possible in 'mthca_allocator.c'

The accesses to the 'alloc->table' bitmap are protected by the
'alloc->lock' spinlock, so no concurrent accesses can happen.

So prefer the non-atomic '__[set|clear]_bit()' functions to save a few
cycles.

Link: https://lore.kernel.org/r/5f909ca1284fa4d2cf13952b08b9e303b656c968.1637785902.git.christophe.jaillet@wanadoo.frSigned-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/mthca/mthca_allocator.c

@@ -51,7 +51,7 @@ u32 mthca_alloc(struct mthca_alloc *alloc)
 	}
 
 	if (obj < alloc->max) {
-		set_bit(obj, alloc->table);
+		__set_bit(obj, alloc->table);
 		obj |= alloc->top;
 	} else
 		obj = -1;
@@ -69,7 +69,7 @@ void mthca_free(struct mthca_alloc *alloc, u32 obj)
 
 	spin_lock_irqsave(&alloc->lock, flags);
 
-	clear_bit(obj, alloc->table);
+	__clear_bit(obj, alloc->table);
 	alloc->last = min(alloc->last, obj);
 	alloc->top = (alloc->top + alloc->max) & alloc->mask;