Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/misc/atmel_tclib.c b/drivers/misc/atmel_tclib.c
index ac24a4b..08b5b63 100644
--- a/drivers/misc/atmel_tclib.c
+++ b/drivers/misc/atmel_tclib.c
@@ -1,4 +1,4 @@
-#include <linux/atmel_tc.h>
+// SPDX-License-Identifier: GPL-2.0-only
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/init.h>
@@ -10,6 +10,7 @@
 #include <linux/slab.h>
 #include <linux/export.h>
 #include <linux/of.h>
+#include <soc/at91/atmel_tcb.h>
 
 /*
  * This is a thin library to solve the problem of how to portably allocate
@@ -111,6 +112,9 @@
 	struct resource	*r;
 	unsigned int	i;
 
+	if (of_get_child_count(pdev->dev.of_node))
+		return -EBUSY;
+
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return -EINVAL;