arm64: fan: update active temperature trip steps

arm64: fan: update active temperature trip steps

Update avtive temperature trip steps vs fan-pwm rates
to follow gradual rising curve instead of rapidly increasing
pwm at higher temperatures

Bug 1631048

Change-Id: I87179edbb6e974b3b8d67f4ca8773b56d2cfacc7
Signed-off-by: Shreshtha SAHU <ssahu@nvidia.com>
Reviewed-on: http://git-master/r/727491
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Laxman Dewangan <ldewangan@nvidia.com>