lpp: call the constraint types lpp_{less|greater}_equal because they are a {less|greater} equal operation

This reverts commit a63fa62c.

While the inliner could do this right,
the fix for now is to not inline such functions.

Since we have no complicated barrier/prolog stuff in the transform phase
anymore we can move away from beabihelper now and create the nodes
directly which will be necessary when modeling special constraints like
wide aligned registers.

So sparc can handle this case now.

Use a special kind of entity on the frame type instead of a value_type
struct inside a method type. This makes replacement of function types
slightly easier (it's still a complex operation though) and handling in
the backend a bit more consistent since it's more or less a normal stack
access (with special offsets).

This was done by removing unnecessary options/options that only
allowed marginal tweakings to improve performance while at the same time
making the interface cumbersome.

Its emitter handles this.