arm64: dts: ti: iot2050: Add IEP interrupts for SR1.0 devices

Add the interrupts needed for PTP Hardware Clock support via IEP
in SR1.0 devices.

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Diogo Ivo <diogo.ivo@siemens.com>
Signed-off-by: David S. Miller <davem@davemloft.net>