Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/Documentation/hwmon/tc74.rst b/Documentation/hwmon/tc74.rst
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+Kernel driver tc74
+====================
+
+Supported chips:
+
+   * Microchip TC74
+
+     Prefix: 'tc74'
+
+     Datasheet: Publicly available at Microchip website.
+
+Description
+-----------
+
+Driver supports the above part.
+
+The tc74 has an 8-bit sensor, with 1 degree centigrade resolution
+and +- 2 degrees centigrade accuracy.
+
+Notes
+-----
+
+Currently entering low power standby mode is not supported.