disp: msm: fix always true/false conditionals

Remove unnecessary error conditionals that are
always true or false.

Change-Id: Ied1041b3165647364b741d3d95edca85039491c2
Signed-off-by: Samantha Tran <samtran@codeaurora.org>
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>

msm/sde/sde_kms.c

@@ -1452,7 +1452,7 @@ static void sde_kms_complete_commit(struct msm_kms *kms,
 		return;
 	priv = sde_kms->dev->dev_private;
 
-	if (sde_kms_power_resource_is_enabled(sde_kms->dev) < 0) {
+	if (!sde_kms_power_resource_is_enabled(sde_kms->dev)) {
 		SDE_ERROR("power resource is not enabled\n");
 		return;
 	}