ICH SPI write seems broken

[Bin Meng]

Hi Simon,

When testing, I see "saveenv" does not work on Intel minnowmax. Do you
have any ideas?

U-Boot 2020.07-rc3-00034-g0fd5234 (May 28 2020 - 15:34:45 +0800)

CPU:   Intel(R) Atom(TM) CPU  E3825  @ 1.33GHz
DRAM:  2 GiB
MMC:   pci_mmc: 0, pci_mmc: 1, pci_mmc: 2
Loading Environment from SPI Flash... SF: Detected n25q064a with page
size 256 Bytes, erase size 4 KiB, total 8 MiB
*** Warning - bad CRC, using default environment

Video: 1280x1024x32
Model: Intel Minnowboard Max
Net:
Warning: eth_rtl8169 using MAC address from ROM
eth0: eth_rtl8169
Hit any key to stop autoboot:  0
=>
=> saveenv
Saving Environment to SPI Flash... SF: Detected n25q064a with page
size 256 Bytes, erase size 4 KiB, total 8 MiB
Erasing SPI flash...Writing to SPI flash...done
OK
=> reset
resetting ...


U-Boot 2020.07-rc3-00034-g0fd5234 (May 28 2020 - 15:34:45 +0800)

CPU:   Intel(R) Atom(TM) CPU  E3825  @ 1.33GHz
DRAM:  2 GiB
MMC:   pci_mmc: 0, pci_mmc: 1, pci_mmc: 2
Loading Environment from SPI Flash... SF: Detected n25q064a with page
size 256 Bytes, erase size 4 KiB, total 8 MiB
*** Warning - bad CRC, using default environment

Video: 1280x1024x32
Model: Intel Minnowboard Max
Net:
Warning: eth_rtl8169 using MAC address from ROM
eth0: eth_rtl8169
Hit any key to stop autoboot:  0
=>

Regards,
Bin