Nicki: Updated device tree for 15.4.A.0.23 based configurations

Change-Id: I8d629923820c6adf5da553ccfc20ba97cf830b18
nicki: Updated GPS HAL to jb_2.6

Change-Id: I2b7df98b0b5d3a1677eb2d4f54d6b61248917918
nicki: Enable ZSL mode

Change-Id: I1acc5dadeee49969e02c8214f95d79f21934fa38
nicki: Switch to qcom power hal

Change-Id: I96f6da6f4deadd57f19c6082941e7dc3bfbe91d8
Nicki: improve boot speed

Change-Id: I8c9ac3b84cd3d1b28d94146138cd795e08f1a8de