[U-Boot] [PATCH 6/6] m28evk: Move README file inside board directory

[Marek Vasut]

Dear Fabio Estevam,

> From: Fabio Estevam <fabio.estevam at freescale.com>
> 
> Board specific READMEs should be located inside the respective board
> directory.

Where did you find this rule?

Best regards,
Marek Vasut