[PORT FROM R2]dma: wrong debug message and wrong masking of error interrupts

[PORT FROM R2]dma: wrong debug message and wrong masking of error interrupts

BZ: 20940

oldBZ-20433
This patch fixes 2 issues :
- In DMA tasklet, debug messages when handling error interrupts are the same as when handling
TX complete interrupts.
- In DMA ISR, if errors are detected at the same time on multiple channels, the ISR masks error
interrupts for wrong channel.
Signed-off-by: Catalin Popescu <catalinx.popescu@intel.com>
Change-Id: Idbad4352d3d6a38fe68bec7dbd03363f59983c6e
Old-Change-Id: Id4755d5e85b9bb916569196d5c51a5c3830781d2
Reviewed-on: http://android.intel.com:8080/32590
Reviewed-by: M, Arulselvan <arulselvan.m@intel.com>
Tested-by: M, Arulselvan <arulselvan.m@intel.com>
Reviewed-by: Popescu, CatalinX <catalinx.popescu@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>