[U-Boot] [PATCH] Makefile: remove generated font files

[Anatolij Gustschin]

Hi Heinrich,

On Tue, 29 Jan 2019 21:15:21 +0100
Heinrich Schuchardt xypron.glpk at gmx.de wrote:

> If `make mrproper` does not delete the generated drivers/video/fonts/*.S
> files a following `make tests` fails.
> 
> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>

Reviewed-by: Anatolij Gustschin <agust at denx.de>

--
Anatolij