power: smb1398: Do not register the die-temperature-shutdown interrupt

Die-temperature-shutdown IRQ may misfire during toggling of SMB_EN input.
Disable it for now.

While at it, also fix die temp debug msg.

Change-Id: I03ed179d19e0828c13eeb3445a1ecba2304e1a7c
Signed-off-by: Ashish Chavan <ashichav@codeaurora.org>