The current code assumes that the cool or warm battery temperature can only be +ve numbers. Remove this restriction by allowing -ve temperature settings. Change-Id: I3c54b854a8fdf934efcf1ff21b36c7a0f763692a CRs-Fixed: 320660 Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>