power: smb5: Reflect die health based on DIE_TEMP_STATUS

Currently die health is reported based on TEMP_RANGE_STATUS register
which reflects the temperature level as a combination of all die, skin
and connector temperature status.

Change die health reporting to be based on DIE_TEMP_STATUS only.

Change-Id: I08350c626e6116eee65aae26c5d5c19968776cfe
Signed-off-by: Umang Agrawal <uagrawal@codeaurora.org>