build: Require libdrm >= 2.4.95

So we can drop the DRM_FORMAT_INVALID fallback

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3480>

meson.build

@@ -51,6 +51,7 @@ wayland_protocols_req = '>= 1.32'
 # native backend version requirements
 libinput_req = '>= 1.19.0'
 gbm_req = '>= 21.3'
+libdrm_req = '>= 2.4.95'
 
 # screen cast version requirements
 libpipewire_req = '>= 0.3.33'
@@ -270,7 +271,7 @@ if have_native_backend
 endif
 
 if have_wayland or have_native_backend
-  libdrm_dep = dependency('libdrm')
+  libdrm_dep = dependency('libdrm', version: libdrm_req)
 endif
 
 have_egl_device = get_option('egl_device')

src/backends/native/meta-kms-utils.c

@@ -23,11 +23,6 @@
 #include <drm_fourcc.h>
 #include <glib.h>
 
-/* added in libdrm 2.4.95 */
-#ifndef DRM_FORMAT_INVALID
-#define DRM_FORMAT_INVALID 0
-#endif
-
 float
 meta_calculate_drm_mode_refresh_rate (const drmModeModeInfo *drm_mode)
 {

src/backends/native/meta-renderer-native.c

@@ -76,11 +76,6 @@
 #define EGL_DRM_MASTER_FD_EXT 0x333C
 #endif
 
-/* added in libdrm 2.4.95 */
-#ifndef DRM_FORMAT_INVALID
-#define DRM_FORMAT_INVALID 0
-#endif
-
 struct _MetaRendererNative
 {
   MetaRenderer parent;