kmsgrab: Fix DRM format definitions

All DRM formats are defined in terms of little-endian words, so RGB formats
like XRGB actually have the elements in the opposite order order in memory
to the order they are in the name.

This does not affect YUYV and similar YUV 4:2:2 formats, which are in the
expected order.

libavdevice/kmsgrab.c

@@ -210,14 +210,14 @@ static const struct {
 #endif
     { AV_PIX_FMT_RGB24,    DRM_FORMAT_RGB888   },
     { AV_PIX_FMT_BGR24,    DRM_FORMAT_BGR888   },
-    { AV_PIX_FMT_0RGB,     DRM_FORMAT_XRGB8888 },
-    { AV_PIX_FMT_0BGR,     DRM_FORMAT_XBGR8888 },
-    { AV_PIX_FMT_RGB0,     DRM_FORMAT_RGBX8888 },
-    { AV_PIX_FMT_BGR0,     DRM_FORMAT_BGRX8888 },
-    { AV_PIX_FMT_ARGB,     DRM_FORMAT_ARGB8888 },
-    { AV_PIX_FMT_ABGR,     DRM_FORMAT_ABGR8888 },
-    { AV_PIX_FMT_RGBA,     DRM_FORMAT_RGBA8888 },
-    { AV_PIX_FMT_BGRA,     DRM_FORMAT_BGRA8888 },
+    { AV_PIX_FMT_0RGB,     DRM_FORMAT_BGRX8888 },
+    { AV_PIX_FMT_0BGR,     DRM_FORMAT_RGBX8888 },
+    { AV_PIX_FMT_RGB0,     DRM_FORMAT_XBGR8888 },
+    { AV_PIX_FMT_BGR0,     DRM_FORMAT_XRGB8888 },
+    { AV_PIX_FMT_ARGB,     DRM_FORMAT_BGRA8888 },
+    { AV_PIX_FMT_ABGR,     DRM_FORMAT_RGBA8888 },
+    { AV_PIX_FMT_RGBA,     DRM_FORMAT_ABGR8888 },
+    { AV_PIX_FMT_BGRA,     DRM_FORMAT_ARGB8888 },
     { AV_PIX_FMT_YUYV422,  DRM_FORMAT_YUYV     },
     { AV_PIX_FMT_YVYU422,  DRM_FORMAT_YVYU     },
     { AV_PIX_FMT_UYVY422,  DRM_FORMAT_UYVY     },