[U-Boot] arm: bootm-fdt.c: fix compiler warning

[Tom Rini]

On Wed, Jan 17, 2018 at 07:00:37AM +0100, Heiko Schocher wrote:

> compiling U-Boot with bosch_mpcxxxxd_sd_defconfig
> drops warning:
> 
> arch/arm/lib/bootm-fdt.c: In function ‘arch_fixup_fdt’:
> arch/arm/lib/bootm-fdt.c:37:6: warning: unused variable ‘ret’ [-Wunused-variable]
>   int ret = 0;
>       ^~~
> 
> Fix it.
> 
> Signed-off-by: Heiko Schocher <hs at denx.de>

Applied to u-boot/master, thanks!

-- 
Tom
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