dt-bindings: thermal: tegra-bpmp: Add Tegra194 support

The thermal controller implementation on Tegra194 is very similar to the
implementation on Tegra186. Add a compatible string for the new
generation.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>