[U-Boot] Problem with qspi when using micron devices

[Phil Edworthy]

Hi Jagan,

When using Micron devices, SPI flash with quad mode does not work since commit
c56ae7519f141523ba1248b22b5b5169b21772fe "sf: Fix quad bit set for micron devices".

This has been pointed out before, details about why the patch does work are here:
http://lists.denx.de/pipermail/u-boot/2016-March/248566.html

I know you are working on spi-nor, but it really would be good to revert the patch.

Thanks
Phil