Add README

Author: Trung Lê

README.md

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+## What is it?
+
+It is just a clone of the official Fedora Linux kernel.
+
+My Raptor Computing System Blackbird workstation with AMD Radeon R9 Nano is known
+to having issue with amdgpu with kernel 5.11 and 5.12. Because the Fedora team decided
+to skip 5.10.24 and jump straight to 5.11.7 for Fedora 33. I have no other choices
+but to fork the official tree to continue with the 5.10.x
+
+Please check out `5-10-f33` branch for details