staging: dgap: remove unnecessary if statement for checking NULL
staging: dgap: remove unnecessary if statement for checking NULL

dgap_release_remap() function is only called after the memory
has been remapped so if statement for checking NULL doesn't
need.

And also release_mem_region() calls are moved after iounmap() calls.

Signed-off-by: Daeseok Youn <9396ba0d387050db72435da746b84d5b8364732d@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs