Use multiple resources structure instead of using the platform
device id in EDMA probe function to initialize multiple EDMA
channel controllers.

Also, the platform_data is being passed as an array to take
care of multiple EDMA channel controllers.
Signed-off-by: Rajashekhara, Sudhakar <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>