[GIT PULL] thermal: new material for hikey for 4.15 #2

Hi Eduardo, ** I'm not if I took the right branch ** The changes are based on top of the thermal-soc branch. Note from the previous pull I removed the hikey960 support series in order to sort out the multiple threshold before submitting again. The pull request contains the following changes:

[GIT PULL] thermal: new material for hikey for 4.15

Hi Rui, Eduardo, ** this is my first pull request for thermal, so I may have choose the wrong branch ** The changes are based on top of the thermal-soc branch. The pull request contains the following changes: - Reworked the hikey6220 thermal driver by improving the code, fixing the interrupt s