Data transfers on third OMAP3 MMC controller don't work
because DMA line numbers are only defined for MMC1 and MMC2.
Fix that and store line numbers in mmc_omap_host structure
to reduce code size.
Tested on OMAP3 pandora board.
Signed-off-by: NGrazvydas Ignotas <notasas@gmail.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>