[lld] [LLD] Recognize 'mipspe' as a PE target name (PR #157305)

[Martin Storsjö via llvm-commits]

https://github.com/mstorsjo commented:

Looks reasonable to me.

Binutils did have some support for MIPS PE/COFF, which is being removed these days. Does this choice of name, `mipspe`, match what they used here? (The naming aspect here should ideally be synchronized, to allow for interoperability.)

https://github.com/llvm/llvm-project/pull/157305