board_model
enum board_model model;
prop_buf = np->vpd.board_model;
np->vpd.board_model[i + 3] = (tmp >> 0) & 0xff;
np->vpd.board_model[i + 2] = (tmp >> 8) & 0xff;
np->vpd.board_model[i + 1] = (tmp >> 16) & 0xff;
np->vpd.board_model[i + 0] = (tmp >> 24) & 0xff;
np->vpd.board_model[val] = '\0';
char board_model[NIU_VPD_BD_MODEL_MAX];