GETFWOFFSET
error = bwn_fwinitvals_write(mac, GETFWOFFSET(fw->initvals, hdr_len),
GETFWOFFSET(fw->initvals_band, hdr_len),
data = GETFWOFFSET(mac->mac_fw.ucode, sizeof(struct bwn_fwhdr));
data = GETFWOFFSET(mac->mac_fw.pcm, sizeof(struct bwn_fwhdr));