Hi Romit
Murata keeps the latest Bluetooth patch file on GitHub.
GitHub - murata-wireless/cyw-bt-patch
Note that 1LV EVB only works on 1.8V, Please make sure to remove J12 on uSD-M.2 Adapter for 1.8V mode.
Also you need to build an image for 1.8V usage for imx6ulevk. Murata recommends running Murata's build script for the image. For more detail, please refer to Murata's quick start guide as @gusarambula mentioned.
Best regards,
Bill