DaVinci: EDMA: Add queue 2 and 3 for DM365 and DM6467

DM365 and DM6467 have 4 queues. The patch updates the
'dma_event_q' enum to reflect this.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>