ipq806x: add ipq806x specific tsens driver

Current upstream driver doesnt fully support ipq806x devices
ipq806x has 11 sensors, the upstream one doesn't allow to check
sensors 0-4, only 5-10.

A specific driver for ipq806x has been found in Qualcomm SDK repo.

https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/?h=release/endive_preview_cc&id=c089e464cd7ce652419a0dc44d7959ce4d24b8a5
https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/?h=release/endive_preview_cc&id=c23d94b702c4182862e7f5051a2b7d00bb922a29
https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/?h=release/endive_preview_cc&id=742f3684b62a6b9f082cb49404b1a92dc0b16bf5
https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/?h=release/endive_preview_cc&id=c0a9b2e2a382c152fa128f5b864c800dd6dfb311



Merging it into LEDE with this commit.

Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>