AIR-11882: neutron: Enable neutron memory cache to improve npu benchmark performance

To improve performance, we have implemented zero-copy optimization for
neutron NPU, and third-party inference engines such as tflite can use
neutron memory directly, thus avoiding to perform memcpy between neutron
ddr memory and application context as follows:
- Avoid copying input data from application to neutron memory.
- Avoid copying output data from neutron memory back to the application.

This patch enables the memory cache and let the driver maintain the
memory and cache coherency.The main changes are:
- Flush the input buffer cache for device before starting inference.
- Invalidate the output buffer cache for cpu after inference is complete.
- Flush other constant data for device via IOCTL in preparation.

Signed-off-by: Jiwei.Fu <jiwei.fu@nxp.com>
Reviewed-by: Forrest Shi <xuelin.shi@nxp.com>
Acked-by: Jason Liu <jason.hui.liu@nxp.com>

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