ion: msm: set dma ops for ion devices

Since of_platform_device_create_pdata no longer results in
of_dma_configure being called make an explicit call to
of_dma_configure for ion devices to ensure their dma ops
are set.

Change-Id: Ia7ad054ca25c0e5b0e9e6d8dd5adaffb86e74fa3
Signed-off-by: Liam Mark <lmark@codeaurora.org>