Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/clk/sunxi/Kconfig b/drivers/clk/sunxi/Kconfig
new file mode 100644
index 0000000..3fba3d3
--- /dev/null
+++ b/drivers/clk/sunxi/Kconfig
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menuconfig CLK_SUNXI
+	bool "Legacy clock support for Allwinner SoCs"
+	depends on ARCH_SUNXI || COMPILE_TEST
+	default y
+
+if CLK_SUNXI
+
+config CLK_SUNXI_CLOCKS
+	bool "Legacy clock drivers"
+	default y
+	help
+	  Legacy clock drivers being used on older (A10, A13, A20,
+	  A23, A31, A80) SoCs. These drivers are kept around for
+	  Device Tree backward compatibility issues, in case one would
+	  still use a Device Tree with one clock provider by
+	  node. Newer Device Trees and newer SoCs use the drivers
+	  controlled by CONFIG_SUNXI_CCU.
+
+config CLK_SUNXI_PRCM_SUN6I
+	bool "Legacy A31 PRCM driver"
+	select MFD_SUN6I_PRCM
+	default y
+	help
+	  Legacy clock driver for the A31 PRCM clocks. Those are
+	  usually needed for the PMIC communication, mostly.
+
+config CLK_SUNXI_PRCM_SUN8I
+	bool "Legacy sun8i PRCM driver"
+	select MFD_SUN6I_PRCM
+	default y
+	help
+	  Legacy clock driver for the sun8i family PRCM clocks.
+	  Those are usually needed for the PMIC communication,
+	  mostly.
+
+config CLK_SUNXI_PRCM_SUN9I
+	bool "Legacy A80 PRCM driver"
+	default y
+	help
+	  Legacy clock driver for the A80 PRCM clocks. Those are
+	  usually needed for the PMIC communication, mostly.
+
+endif