ARM: OMAP: dma: Remove the erroneous freeing of platform data

Given p = pdev->dev.platform_data; and
      d = p->dma_attr;
the freeing of either one of these by the driver
seems just plain wrong.

Get rid of them in the .probe failure path as well as the
.remove.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>