dmaengine: edma: Correct PaRAM access function names (_parm_ to _param_)

These inline functions are designed to modify parts of the PaRAM in eDMA.
Change the names accordingly.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>