[U-Boot] [PATCH 3/7] 83xx/85xx/86xx: Add ECC support

[Liu Dave-R63238]

> You can inject data in the upper/lower 32 bit data path, or in the ecc
> path using the "ecc inject" command shown above.  The inject command
> takes a mask that is XORed with the proper data, eg "ecc 
> inject low 0x5"
> would result in data bits 0 and 2 always being swapped resulting in
> multibit errors.

IIRC, 85xx cache is enabled, so when we do the ecc error inject test,
What will happen before disable ecc error inject?
I-fetch may get wrong instruction?