CODEOWNERS: Add xc-racer99 to main/mesa-pvr-dri-classic (MR 1868)

I'd like to be notified if anyone makes a change to this package

[ci:skip-build]: already built successfully in CI

CODEOWNERS

@@ -3,6 +3,7 @@
 device/*/*-pine64-pinephone/        @craftyguy @milesalan
 device/*/*-purism-librem5/          @craftyguy
 main/osk-sdl/                       @craftyguy
+main/mesa-pvr-dri-classic/          @xc-racer99
 temp/u-boot-librem5/                @craftyguy
 
 # vim: ts=4 sw=4 et