spi: spi-geni-qcom: Reset the dma engine on failure

On a DMA transfer timeout failure, reset the TX/RX DMA
engines to avoid any SMMU fault caused as a consequence
of the DMA engine getting restarted and trying to access
the unmapped buffer addresses.

Change-Id: Ic2f637b3a90dc63a27d2b2f53442ac071a56337c
Signed-off-by: Vipin Deep Kaur <vkaur@codeaurora.org>