[PATCH v1] env: Fix compile error for envtools

[Jacky.Cao at sony.com]

>> Host OS is Ubuntu 22.04.3 LTS.
>> Toolchain is Arm GNU Toolchain 11.3.Rel1(arm-none-linux-gnueabihf-).
>> Also tried Ubuntu 24.04.4 LTS and Arm GNU Toolchain 15.3.Rel1, the 
>> issue still happens.
>
>So, are you on an ARM host too? You aren't specifying where you are / aren't using the ARM toolchain in the above. Thanks.

Sorry for not explaining it clearly.
Host machine is x86_64 Ubuntu 22.04.3 LTS.
Using arm-none-linux-gnueabihf-gcc 11.3.Rel1 as a cross compiler to build u-boot and envtools for imx6 target.
I also tested on x86_64 Ubuntu 24.04.4 LTS with Arm GNU Toolchain 15.3.Rel1, and the issue still occurs.