hal: Add the missing sound device of voice_speaker

8x10 skuab uses lineout path instead of speaker. Add the missing
voice_speaker device in the array so that hal can select the
correct path for voice speaker in 8x10 skuab.

CRs-fixed: 621807
Change-Id: I5509184e368121cb1825392fce3860af20a9fa44
Merge branch 'du44' of github.com:barry-smithjr/android_hardware_qcom_audio-caf-m8 into du44