fix codehub warnings

Signed-off-by: guowen666 <guowen24@huawei.com>

model/display/driver/hdf_disp.c

@@ -626,7 +626,7 @@ static int32_t EsdCheckInit(struct DispManager *disp)
     ret = EsdResInit(esd, panel);
     if (ret != HDF_SUCCESS) {
         HDF_LOGE("%s EsdResInit fail", __func__);
-        esd = NULL;
+        EsdMemFree(esd);
         return HDF_FAILURE;
     }
     disp->esd = esd;

model/display/driver/hdf_drm_panel.c

@@ -227,7 +227,7 @@ int32_t HdfDrmPanelEntryInit(struct HdfDeviceObject *object)
         ret = drm_panel_add(&hdfDrmPanel->panel);
         if (ret) {
             HDF_LOGE("%s drm_panel_add() failed", __func__);
-            hdfDrmPanel = NULL;
+            OsalMemFree(hdfDrmPanel);
             return ret;
         }
         ret = mipi_dsi_attach(dsiDev);