Add amd-ucode README file

Create new README file describing the microcode patch levels included in the
microcode container files in the amd-ucode directory.

Signed-off-by: John Allen <john.allen@amd.com>
[WHENCE entry added by Josh Boyer <jwboyer@kernel.org>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -3957,6 +3957,7 @@ File: amd-ucode/microcode_amd_fam17h.bin
 Version: 2022-04-08
 File: amd-ucode/microcode_amd_fam19h.bin
 Version: 2022-04-08
+File: amd-ucode/README
 
 License: Redistributable. See LICENSE.amd-ucode for details
 
@@ -5945,4 +5946,4 @@ only in connection with Cirrus Logic hardware products.
 Copyright © 2022 Cirrus Logic, Inc. and Cirrus Logic International
 Semiconductor Ltd. All Rights Reserved.
 
----------------------------------------------------------------------------
+---------------------------------------------------------------------------

amd-ucode/README

@@ -0,0 +1,41 @@
+This repository includes microcode container files for family 15h, 16h,
+17h, and 19h AMD CPUs. Microcode patches for families earlier than 15h are
+included in the microcode_amd.bin microcode container file. The microcode
+patches included in an AMD CPU microcode container file can be listed using
+the script in the following git repository:
+https://github.com/AMDESE/amd_ucode_info
+
+The microcode patches included in the container files in this directory are
+listed below:
+
+Microcode patches in microcode_amd.bin:
+  Family=0x10 Model=0x02 Stepping=0x02: Patch=0x01000083 Length=960 bytes
+  Family=0x10 Model=0x02 Stepping=0x0a: Patch=0x01000084 Length=960 bytes
+  Family=0x10 Model=0x06 Stepping=0x02: Patch=0x010000c7 Length=960 bytes
+  Family=0x10 Model=0x05 Stepping=0x03: Patch=0x010000c8 Length=960 bytes
+  Family=0x10 Model=0x09 Stepping=0x01: Patch=0x010000d9 Length=960 bytes
+  Family=0x10 Model=0x08 Stepping=0x00: Patch=0x010000da Length=960 bytes
+  Family=0x10 Model=0x05 Stepping=0x02: Patch=0x010000db Length=960 bytes
+  Family=0x10 Model=0x0a Stepping=0x00: Patch=0x010000dc Length=960 bytes
+  Family=0x11 Model=0x03 Stepping=0x01: Patch=0x02000032 Length=512 bytes
+  Family=0x12 Model=0x01 Stepping=0x00: Patch=0x03000027 Length=960 bytes
+  Family=0x14 Model=0x01 Stepping=0x00: Patch=0x05000029 Length=1568 bytes
+  Family=0x14 Model=0x02 Stepping=0x00: Patch=0x05000119 Length=1568 bytes
+
+Microcode patches in microcode_amd_fam15h.bin:
+  Family=0x15 Model=0x01 Stepping=0x02: Patch=0x0600063e Length=2592 bytes
+  Family=0x15 Model=0x02 Stepping=0x00: Patch=0x06000852 Length=2592 bytes
+  Family=0x15 Model=0x10 Stepping=0x01: Patch=0x06001119 Length=2592 bytes
+
+Microcode patches in microcode_amd_fam16h.bin:
+  Family=0x16 Model=0x00 Stepping=0x01: Patch=0x0700010f Length=3458 bytes
+
+Microcode patches in microcode_amd_fam17h.bin:
+  Family=0x17 Model=0x08 Stepping=0x02: Patch=0x0800820d Length=3200 bytes
+  Family=0x17 Model=0x01 Stepping=0x02: Patch=0x0800126e Length=3200 bytes
+  Family=0x17 Model=0x31 Stepping=0x00: Patch=0x08301055 Length=3200 bytes
+
+Microcode patches in microcode_amd_fam19h.bin:
+  Family=0x19 Model=0x01 Stepping=0x00: Patch=0x0a001058 Length=5568 bytes
+  Family=0x19 Model=0x01 Stepping=0x01: Patch=0x0a001173 Length=5568 bytes
+  Family=0x19 Model=0x01 Stepping=0x02: Patch=0x0a001229 Length=5568 bytes