Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/gpu/drm/drm_trace.h b/drivers/gpu/drm/drm_trace.h
index baccc63..471eb92 100644
--- a/drivers/gpu/drm/drm_trace.h
+++ b/drivers/gpu/drm/drm_trace.h
@@ -6,6 +6,8 @@
 #include <linux/types.h>
 #include <linux/tracepoint.h>
 
+struct drm_file;
+
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM drm
 #define TRACE_INCLUDE_FILE drm_trace