[3.8.x] Re-enable ppc64le

[xylar]

It has been re-enabled in proj in https://github.com/conda-forge/proj.4-feedstock/pull/150

Checklist

• [x] Used a personal fork of the feedstock to propose changes
• [x] Bumped the build number (if the version is unchanged)
• [x] Re-rendered with the latest conda-smithy (Use the phrase code>@<space/conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• [x] Ensured the license file is being packaged.

[conda-forge-webservices[bot]]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

[xylar]

@conda-forge-admin, please rerender

[akrherz]

c/f #918