Support tensor cache while create tensor
Tensor can be shared between different operations, if tensor have
identical data and quantization parameter, they should share same
low-level tensor object to save memory.
In tim-vx, introduce a tensor cache which key is md5sum and value is
low-level tensor object. If up-coming tensor have same md5sum, the
cached tensor object reused for tensor creation.
Type: New feature
Signed-off-by: Chen Xin <jack.chen@verisilicon.com>
Co-authored-by: Chen Xin <jack.chen@verisilicon.com>