Cannot change npu power mode

Changing the NPU power mode from the default "performance" to "turbo" doesn't change its actual capabiility to run faster.

Despite running the command sudo xrt-smi configure -d <BDF> --pmode turbo reports it being correctly executed and consequently the modality to supposedly having been changed, in reality npu performances after the above command aren't affected at all as also stated by the command sudo xrt-smi validate -d <BDF> reporting the npu being stuck into "performance" mode and also confirmed by running a simple test:

executing into "flm run qwen3.5:2b" the prompt "a website can be made in 10 steps":

PERFORMANCE MODE
Average decoding speed:       23.8301 tokens/s
Average prefill  speed:       30.7483 tokens/s

TURBO MODE
Average decoding speed:       23.8648 tokens/s
Average prefill  speed:       31.7367 tokens/s

Start by reproducing the reported commands with xrt-smi configure and xrt-smi validate for the affected BDF, then compare the reported power mode and benchmark results. Trace the power-mode handling from the xrt-smi entry point into the NPU configuration path. Done means turbo mode is applied and validate and performance measurements reflect the change.