[PATCH] mx9: Correct repeatable build error

[Peng Fan]

> Subject: [PATCH] mx9: Correct repeatable build error
> 
> For some reason every second time imx93_11x11_evk is built it gives
> an
> error:
> 
>    make O=/tmp/x BINMAN_ALLOW_MISSING=1
> 
> It seems to sometimes skip generation of the .cfgout file and then
> eventually Binman complains:
> 
>    ValueError: Error 1 running 'mkimage -d ./mkimage.spl.mkimage -n
>       spl/u-boot-spl.cfgout -T imx8image -e 0x2049A000
>       ./mkimage-out.spl.mkimage': Fail open first container file
>       mx93a1-ahab-container.img
> 
> Correct this by using if_changed instead of if_changed_dep
> 
> The only reason this hasn't come up in CI is that buildman did not retry
> failing builds of current source, but now it does.
> 
> Note: The logic in this Makefile should be moved to Binman, e.g. these
> warnings duplicate Binman functionality:
> 
>   WARNING 'bl31.bin' not found, resulting binary may be not-functional
>   WARNING 'tee.bin' not found, resulting binary may be not-functional
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>

Reviewed-by: Peng Fan <peng.fan at nxp.com>