nfp_xpb_readl
err = nfp_xpb_readl(pf->cpp, cpp_rd_addr, (u32 *)dest);
int nfp_xpb_readl(struct nfp_cpp *cpp, u32 xpb_tgt, u32 *value);
err = nfp_xpb_readl(cpp, xpb_tgt, &tmp);
err = nfp_xpb_readl(cpp, xpbaddr,
err = nfp_xpb_readl(cpp, NFP_XPB_DEVICE(1, 1, 16) + NFP_PL_DEVICE_ID,