RDMA/hns: Fix wrong field of SRQ number the device supports

The SRQ capacity is got from the firmware, whose field should be ended at
bit 19.

Fixes: ba6bb7e9 ("RDMA/hns: Add interfaces to get pf capabilities from firmware")
Link: https://lore.kernel.org/r/1606382812-23636-1-git-send-email-liweihang@huawei.comSigned-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/hns/hns_roce_hw_v2.h

@@ -1661,7 +1661,7 @@ struct hns_roce_query_pf_caps_d {
 	__le32 rsv_uars_rsv_qps;
 };
 #define V2_QUERY_PF_CAPS_D_NUM_SRQS_S 0
-#define V2_QUERY_PF_CAPS_D_NUM_SRQS_M GENMASK(20, 0)
+#define V2_QUERY_PF_CAPS_D_NUM_SRQS_M GENMASK(19, 0)
 
 #define V2_QUERY_PF_CAPS_D_RQWQE_HOP_NUM_S 20
 #define V2_QUERY_PF_CAPS_D_RQWQE_HOP_NUM_M GENMASK(21, 20)