[U-Boot] [PATCH] doc: README.mxs: Add instruction to install 'libssl-dev'

[Marek Vasut]

Dear Fabio Estevam,

> On Sat, Sep 14, 2013 at 7:21 PM, Fabio Estevam <festevam at gmail.com> wrote:
> > From: Fabio Estevam <fabio.estevam at freescale.com>
> > 
> > Building the mx28evk target on a host PC without the 'libssl-dev'
> > package, results in the following build error:
> > 
> > mxsimage.c:18:25: fatal error: openssl/evp.h: No such file or directory
> > 
> > Add an entry about the need of installing this package.
> > 
> > Also, remove the 'elftosb' text, since now we have the new 'mxsimage'
> > method.
> 
> Ops, looks like we cannot remove elftosb yet.
> 
> When I try "make u-boot.sb":
> 
> make[1]: Entering directory
> `/home/fabio/denx/u-boot/arch/arm/cpu/arm926ejs/mxs' sed
> "s at OBJTREE@/home/fabio/denx/u-boot at g"
> /home/fabio/denx/u-boot/arch/arm/cpu/arm926ejs/mxs/u-boot-imx28.bd >
> /home/fabio/denx/u-boot/u-boot.bd
> elftosb -zf imx28 -c /home/fabio/denx/u-boot/u-boot.bd -o
> /home/fabio/denx/u-boot/u-boot.sb
> make[1]: elftosb: Command not found

mxsimage is not enabled by default yet, I would like to postpone that for next 
release. But (!) it would be nice if you did start testing it so when enabled, 
it is working well.

Best regards,
Marek Vasut