RDMA/hns: Fix spelling mistake "epmty" -> "empty"

There is a spelling mistake in a dev_dbg message. Fix it.

Link: https://lore.kernel.org/r/20200805141111.22804-1-colin.king@canonical.com
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/hns/hns_roce_hw_v1.c

@@ -535,7 +535,7 @@ static void hns_roce_set_sdb_ext(struct hns_roce_dev *hr_dev, u32 ext_sdb_alept,
 	roce_write(hr_dev, ROCEE_EXT_DB_SQ_H_REG, val);
 
 	dev_dbg(dev, "ext SDB depth: 0x%x\n", db->ext_db->esdb_dep);
-	dev_dbg(dev, "ext SDB threshold: epmty: 0x%x, ful: 0x%x\n",
+	dev_dbg(dev, "ext SDB threshold: empty: 0x%x, ful: 0x%x\n",
 		ext_sdb_alept, ext_sdb_alful);
 }