RDMA/bnxt_re: Avoid displaying the kernel pointer

RDMA/bnxt_re: Avoid displaying the kernel pointer

While dumping the info on MR using the rdma tool, we
dump the mr_hwq which is a kernel pointer. There is
no need to expose this value for end user. So avoid
it.

Fixes: 7363eb76b7f3 ("RDMA/bnxt_re: Support driver specific data collection using rdma tool")
Link: https://patch.msgid.link/r/20260615224751.232802-9-selvin.xavier@broadcom.com
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>