b12385

qwen2vl : apply FFN weight scales (#32241)

The qwen2vl graph passed NULL for the ffn_up/gate/down scales, so the
per-tensor NVFP4 scales loaded by the generic pass were never applied
and the model produced garbage (PPL ~1e6 on CUDA, NaN on CPU).

Pass the scales to build_ffn like qwen2 does.

Fixes #32101

Website:

• https://llama.app

Attestations:

• https://github.com/ggml-org/llama.cpp/attestations/67603309

macOS/iOS:

• macOS Apple Silicon (arm64)
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Linux:

• Ubuntu x64 (CPU)
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• UI