Revert "dmaengine: dw: platform: provide platform data for Intel"

Since we have a work around to prevent a system hangup we don't need to provide
a platform data explicitly anymore.

This reverts commit 175267b3.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>