r300: opt in to clang-format CI enforcement for the compiler

Signed-off-by: Pavel Ondračka <[email protected]>
Acked-by: Filip Gawin <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23771>

Author: ondracka

.clang-format-include

@@ -2,6 +2,7 @@
 # enforcement in the CI.
 
 src/gallium/drivers/i915
+src/gallium/drivers/r300/compiler/*
 src/gallium/targets/teflon/**/*
 src/amd/vulkan/**/*
 src/amd/compiler/**/*