This was done as an afterthought in c3c9e45312 without justification.
Nothing relies on it being a specific kind of section, and downstream in
CHERI LLVM we pass a non-GotSection to this function. Thus revert this
overly-restrictive change and allow downstreams to pass other section
types again.
This partially reverts commit c3c9e45312.
bd47ba7056