[U-Boot] [PATCH v2] build: imx: Fix 'u-boot.imx' build without full OBJTREE reference

[Marek Vasut]

Dear Otavio Salvador,

> When calling 'make u-boot.imx' the build were failing as it were
> expecting the full path for the file; this regression has been
> included by commit 71a988a (imximage.cfg: run files through C
> preprocessor).
> 
> The direct references for u-boot.imx were replaced by $(obj) as
> config.mk handles the proper setting of it making it set to $(OBJTREE)
> when required.
> 
> The build has been test using:
> 
>  - ./MAKEALL -s mx5 -s mx6
>  - make u-boot.imx
>  - make O=/tmp/build

BUILD_DIR=/tmp/xyz MAKEALL please.

Best regards,
Marek Vasut