drm/tegra: Use fourcc_mod_is_vendor() helper

Rather than open-coding the vendor extraction operation, use the newly
introduced helper macro.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210610111236.3814211-3-thierry.reding@gmail.com

drivers/gpu/drm/tegra/fb.c

@@ -44,7 +44,7 @@ int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
 {
 	uint64_t modifier = framebuffer->modifier;
 
-	if ((modifier >> 56) == DRM_FORMAT_MOD_VENDOR_NVIDIA) {
+	if (fourcc_mod_is_vendor(modifier, NVIDIA)) {
 		if ((modifier & DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT) == 0)
 			tiling->sector_layout = TEGRA_BO_SECTOR_LAYOUT_TEGRA;
 		else

drivers/gpu/drm/tegra/plane.c

@@ -109,7 +109,7 @@ static bool tegra_plane_format_mod_supported(struct drm_plane *plane,
 		return true;
 
 	/* check for the sector layout bit */
-	if ((modifier >> 56) == DRM_FORMAT_MOD_VENDOR_NVIDIA) {
+	if (fourcc_mod_is_vendor(modifier, NVIDIA)) {
 		if (modifier & DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT) {
 			if (!tegra_plane_supports_sector_layout(plane))
 				return false;