power: smb1360: Add property to change hard JEITA hysteresis

SMB1360 has one centigrade hysteresis for hard JEITA by default. Add
a method to change the hard JEITA hysteresis other than one centigrade.

CRs-Fixed: 846212
Change-Id: I579df8c918805b3288bcdd4ba8c92723f110d011
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
Signed-off-by: Qiang Huang <qianghuang@codeaurora.org>
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>