drm: sti: fix static checker warning in sti_awg_utils

The shift and the mask done on arg value is useless
since arg is null.

Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
This commit is contained in:
Vincent Abriou 2015-02-04 16:54:13 +01:00 • committed by Benjamin Gaignard
commit 17ba9810ec