ARM: edma: Do not change TC -> Queue mapping, leave it to default.

There is no need to change the default TC -> Queue mapping. By default the
mapping is: TC0 -> Q0, TC1 -> Q1, etc.
Changing this has no benefits at all and all the board files are just setting
the same mapping back to the HW.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>