Correct a typo where safety time is used for trickle charge time in the code. Add the valid ranges and power on defaults for safety timer and trickle charge timer. CRs-Fixed: 313652 Change-Id: I49a04c6445d197555b2a434bf4577b6e38e3d3e3 Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>