Bluetooth can not enable in Quark x1000

Hi Intel

My platform is quark x1000. And my platform use Intel® Dual Band Wireless-AC 7260 Wi-Fi and Bluetooth module.

Step (1) We used "uclibc" to build SD card image in quark x1000.

             My platform BT bluetooth is pass.  

Step (1) We used eglibc to build SD card image in quark x1000.

             My platform BT bluetooth is fail.

              hcitools can not init BT.

$ rfkill list

0: hci0: Bluetooth

        Soft blocked: yes

        Hard blocked: no

Do u have any idea to fix the issue about BT fail in eglibc?

Thanks