ARM: tegra: Hook up edp interrupt on Tegra124 SOCTHERM

For some reason this was never hooked up. Do it now so that over-current
interrupts can be logged.

Reported-by: Nicolas Chauvet <kwizart@gmail.com>
Suggested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>