selftests: media_dcevice_test fix to handle ioctl failure case

Fix to print information returned by ioctl only when
it returns success.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
Shuah Khan 2016-02-25 10:17:42 -07:00
commit 36d3f7d820