[U-Boot] [PATCH v2] sunxi: Support booting from SPI flash

[boobwrt at gmail.com]

Hello

Nice to see new entry to boot.
I would like to know if sdcard wired in spi mode can working with this spi boot support.
Why put sdcard in spi when i have an sdcard slot? :)
Just to solder it for bypass crappy sdcard socket pin contact then boot from usb.
microsd was cheap in 512mb size or less.

Is there limitation in chip memory selection?
Anyway thank for new support