Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
index 8ab5df7..e8ca62b 100644
--- a/include/linux/fpga/fpga-mgr.h
+++ b/include/linux/fpga/fpga-mgr.h
@@ -198,4 +198,8 @@
 int fpga_mgr_register(struct fpga_manager *mgr);
 void fpga_mgr_unregister(struct fpga_manager *mgr);
 
+struct fpga_manager *devm_fpga_mgr_create(struct device *dev, const char *name,
+					  const struct fpga_manager_ops *mops,
+					  void *priv);
+
 #endif /*_LINUX_FPGA_MGR_H */