[U-Boot] [PATCH 2/2] common: Use separate dirs for each board for ccache

[Marek Vasut]

Dear Marek Vasut,

> When using ccache in MAKEALL, use separate directory for the cache
> for each board. This way we can avoid rewriting the same files by
> building other boards.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Tom Rini <trini at ti.com>

This one will need more work, sorry.

Best regards,
Marek Vasut