H616: No SPI flash detected.

..... what should I do?

```
$ ./sunxi-fel.exe ver
AWUSBFEX soc=00001823(H616) 00000001 ver=0001 44 08 scratchpad=00027e00 00000000 00000000
```

```
$ ./sunxi-fel.exe -v spiflash-info
No SPI flash detected.
```