bhnd_nvram_value_size
if ((iwidth = bhnd_nvram_value_size(NULL, 0, var_btype, 1)) == 0) {
if ((ilen = bhnd_nvram_value_size(NULL, 0, itype, nelem)) == 0) {
size_t bhnd_nvram_value_size(const void *inp,
*olen = bhnd_nvram_value_size(inp, ilen, itype, 1);
*olen = bhnd_nvram_value_size(next, ilen - offset, itype, 1);