ARM: edma: No need to clean the pdata in edma_of_parse_dt()

The pdata has been just allocated with devm_kzalloc() in
edma_setup_info_from_dt() and passed to this function.

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