Comment 2 for bug 880859

Try building u-boot with CONFIG_SYS_HUSH_PARSER to get proper support for our boot script syntax

Concerning load address, you could have a separate board+config for a5 or you could build the same board twice under different names, see how efikasb/efikamx does this for instance. If there's a way to detect this at runtime, that would be ideal though!