fsldma: minor codingstyle and consistency fixes

This fixes some minor violations of the coding style. It also changes
the style of the device_prep_dma_*() function definitions so they are
identical.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --cc drivers/dma/fsldma.c
Simple merge

diff --cc drivers/dma/fsldma.h
Simple merge