Fold generate-for bound reading an interface-port localparam (sub.BYT)

[alaindargelas]

A generate-for whose loop bound reads an interface localparam through the interface instance/port — for (i=0; i<sub.CFG_BUS_BYT; i++) in a module that takes the interface as a port — was silently dropped: the interface INSTANCE is not yet bound to the port at generate-elaboration time, so sub.BYT stayed a non-constant hier_path, getValue returned invalidValue, and the whole loop produced 0 gen scopes. This is the jeras/rp32 tcb_lite_lib_logsize2byteena byte-enable / read-data reshaping loops, whose absence left the fetch/read data path (sub.rsp.rdt) undriven (X) in the degu SoC.

Resolve such a <port>.<member> value read from the port's interface TYPE definition instead of the (not-yet-bound) instance: new CompileHelper::resolveInterfacePortMember looks up the port Signal on the component, gets its interface def (Signal::getInterfaceDef, or by type name), and evaluates the member param/localparam in that definition's context, returning the constant. Hooked in compileSelectExpression once the full dotted hname is known, for a plain 2-level base.member (no selects/brackets) under Reduce::Yes; deeper struct-field paths (sub.CFG.BUS.MOD) are left untouched.

New regression: tests/GenForIfaceLocalparamBound (asserts work@top.c.g[0..3]
are elaborated). Full regression: 784 PASS, 0 failures.

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