[D] Fixed path (fix.diff: free ps_privs, NULL the pointer,
    propagate rc; radeon_pm checks dpm.init rc)
        [kzalloc #5 fails — memory pressure]
    rc=-ENOMEM propagated; dpm.ps = NULL; ps_privs freed;
    radeon_pm_init_dpm aborts before touching boot_ps;
    ni_dpm_fini kfree(NULL) — no double free, no leak