arm64: fan: update active temperature trip steps

arm64: fan: update active temperature trip steps

Change trip temperature calculation to be based only on averate of
CPU-therm+GPU-therm instead of average of Tdiode+Tboard. Also update
active temperature trip steps vs fan-pwm rates for Jetson-E

Bug 1631048

Change-Id: I466510ce91ab6487336203702cf3f5d0da95cb17
Signed-off-by: Shreshtha SAHU <ssahu@nvidia.com>
Reviewed-on: http://git-master/r/734938
(cherry picked from commit 63df09edd734767f4e953dba9358748177e7bc54)
Reviewed-on: http://git-master/r/781632
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>