disp: msm: fix compilation errors for dlkm compilation

Fix dlkm compilation errors that are due to the use of -Werror
flags used by the build system.

Change-Id: I5e1e9bc63c1361d73e4930aab123212717872ecb
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>

msm/dsi/dsi_panel.c

@@ -584,7 +584,7 @@ static int dsi_panel_update_pwm_backlight(struct dsi_panel *panel,
 
 	rc = pwm_config(bl->pwm_bl, duty, period_ns);
 	if (rc) {
-		DSI_ERR("[%s] failed to change pwm config, rc=\n", panel->name,
+		DSI_ERR("[%s] failed to change pwm config, rc=%d\n", panel->name,
 			rc);
 		goto error;
 	}
@@ -598,7 +598,7 @@ static int dsi_panel_update_pwm_backlight(struct dsi_panel *panel,
 	if (bl_lvl != 0 && !bl->pwm_enabled) {
 		rc = pwm_enable(bl->pwm_bl);
 		if (rc) {
-			DSI_ERR("[%s] failed to enable pwm, rc=\n", panel->name,
+			DSI_ERR("[%s] failed to enable pwm, rc=%d\n", panel->name,
 				rc);
 			goto error;
 		}