[U-Boot] [U-boot] regression: bootaux doesn't work with DCACHE enabled

Hi all,

U-boot imx-specific bootaux command doesn't work properly with the old legacy binary format if the DCACHE is enabled (I've tested only executing from OCRAM) in the mainline U-boot.

Interesting thing is that invocation of `dcache flush` before bootaux doesn't help, but only full disabling it with `dcache off`.

To reproduce:

tftpboot ${loadaddr} ${board_name}/hello_world.bin cp.b ${loadaddr} 0x7F8000 $filesize bootaux 0x7F8000

However this works:

tftpboot ${loadaddr} ${board_name}/hello_world.bin cp.b ${loadaddr} 0x7F8000 $filesize dcache off bootaux 0x7F8000

Any ideas and suggestions? Thanks