mcp980x_s8b_set
mcp980x_s8b_set(sc, MCP980X_TEMP_LIMIT, val);
mcp980x_s8b_set(sc, MCP980X_TEMP_HYSTERESIS, val);
static void mcp980x_s8b_set(struct mcp980x_softc *, uint8_t, int8_t);