drm/msm/sde: Add braces around suspicious indent

This looks wrong. Let's add braces here to fix the suspicious
indentation.

Change-Id: I010db7d146e8916533354befb82aa8649589c00a
Cc: Gopikrishnaiah Anandan <agopik@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>