staging: dgnc: remove NULL test

This NULL test is not required as iounmap will validate the argument.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sudip Mukherjee 2015-10-03 20:52:46 +05:30 • committed by Greg Kroah-Hartman
commit e24bb0ed81