pre-commit: auto remove unneeded trailing whitespace from Makefiles (#378)

Cleaned up some whitespace in the Makefiles

(cherry picked from commit 4437c02e18a852c4a5e7d7e7c198180f06b2b9fc)

pre-commit auto remove trailing whitespace from `.mk` files (#377)

If there are too many changes / files I can create a smaller PR

Thanks

(cherry picked from commit 31bbceb0f9d64c0c2c3b22a794a1666

pre-commit auto remove trailing whitespace from `.mk` files (#377)

If there are too many changes / files I can create a smaller PR

Thanks

(cherry picked from commit 31bbceb0f9d64c0c2c3b22a794a1666c1f33396e)

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