ARM: dts: DRA7: Add IVA thermal data

This patch changes a dtsi file to contain the thermal data
for IVA domain. This data will enable a thermal shutdown at 125C.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>