msm_fb: display: move the prefill function inside the config flag

There is a compilation error if the config flag is not set, so the
func has to be moved inside the #ifdef.

Change-Id: I6163606c389e8e4767239cf74eb8260fca728728
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>
1 file changed