cmd/compile: fix transform of OEQ/ONE when one arg is a type param

cmd/compile: fix transform of OEQ/ONE when one arg is a type param

At this point in stenciling, we have shape types, not raw type parameters.
The code was correct in the other part of this function.

Update #51522

Change-Id: Ife495160a2be5f6af5400363c3efb68dda518b5f
Reviewed-on: https://go-review.googlesource.com/c/go/+/391475
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>