ARM: DTS: da850: Enable eDMA1

The eDMA1 in da850 has only one TPTC and for example MMC1 is HW events are
handled by it.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Sushaanth Srirangapathi <sushaanth.s@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>