dma/intel_mid_dma: remove unneeded null check

Smatch complains because we dereference "mid" before checking it.  It
turns out that "mid" is always a valid pointer here so we can just
remove the check.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
1 file changed