qlnx: qlnxe: Fix kernel address leakage

In function qlnx_rdma_deregister_if,
the address of object rdma_if will be printed out.
rdma_if is the address of a global variable qlnxr_drv,
which is passed from dev/qlnx/qlnxr/qlnxr_os.c
A kernel address leakage happens.
Fix this by removing the printf statement.

PR: 238646

(cherry picked from commit 9370f49ad1c4625cd73c4d84d3e42ed3e20fabbf)