In mmc_davinci_xfer_done() function data direction variable
is being modified before the call to davinci_abort_dma().
But inside the davinci_abort_dma() function data direction
variable is being checked to select the channel to abort.

Without this patch, davinci_abort_dma() function always
aborts, TX channel dma.
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Acked-by: Vipin Bhandari <vipin.bhandari@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>