[PATCH] cmd: Fix potential memory leaks

[Tom Rini]

On Wed, Feb 05, 2025 at 07:00:25PM +0300, Maks Mishin wrote:

> Dynamic memories, referenced by 'ptr' and 'res' is allocated 
> by calling function 'hexport_r' and lost when the function success returns.
> 
> Signed-off-by: Maks Mishin <maks.mishinFZ at gmail.com>

This leads to run time failures such as:
https://source.denx.de/u-boot/u-boot/-/jobs/1018913

-- 
Tom
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