video, udlfb: Fix two build warnings about 'ignoring return value'
build warning:
...
drivers/video/udlfb.c:1590: warning: ignoring return value of ‘device_create_file’, declared with attribute warn_unused_result
drivers/video/udlfb.c:1592: warning: ignoring return value of ‘device_create_bin_file’, declared with attribute warn_unused_result
...
So add two checks to get rid of 'em.
Signed-off-by: Liu Yuan <tailai.ly@taobao.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>