RDMA/hns: Fix incorrect congest type configuration

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8HYSU



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hr_dev->caps.congest_type stands for the supported algorithm set, but
not the specific algorithm type. The correct configuration item should
be ilog2(hr_qp->congest_type).

Fixes: 09f1b7cb ("RDMA/hns: Support congestion control algorithm configuration at QP granularity")
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>