drm/stm: ltdc: fix various coding-style warnings

Fix issues reported by checkpatch.pl:
- Braces {} should be used on all arms
- Blank lines
Signed-off-by: Yannick Fertre <yannick.fertre@foss.st.com>
Acked-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Signed-off-by: Philippe Cornu <philippe.cornu@foss.st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220603134334.592805-1-yannick.fertre@foss.st.com

drivers/gpu/drm/stm/ltdc.c

@@ -911,9 +911,9 @@ static void ltdc_crtc_mode_set_nofb(struct drm_crtc *crtc)
 		drm_connector_list_iter_end(&iter);
 	}
 
-	if (bridge && bridge->timings)
+	if (bridge && bridge->timings) {
 		bus_flags = bridge->timings->input_bus_flags;
-	else if (connector) {
+	} else if (connector) {
 		bus_flags = connector->display_info.bus_flags;
 		if (connector->display_info.num_bus_formats)
 			bus_formats = connector->display_info.bus_formats[0];
@@ -1920,7 +1920,6 @@ int ltdc_load(struct drm_device *ddev)
 			DRM_ERROR("Failed to register LTDC interrupt\n");
 			goto err;
 		}
-
 	}
 
 	crtc = devm_kzalloc(dev, sizeof(*crtc), GFP_KERNEL);