Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/firmware/imx/Makefile b/drivers/firmware/imx/Makefile
new file mode 100644
index 0000000..08bc9dd
--- /dev/null
+++ b/drivers/firmware/imx/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_IMX_DSP)		+= imx-dsp.o
+obj-$(CONFIG_IMX_SCU)		+= imx-scu.o misc.o imx-scu-irq.o
+obj-$(CONFIG_IMX_SCU_PD)	+= scu-pd.o