compiler: Make shader_enums.h CL-safe

macros.h is not safe for CL for a bunch of reasons but shader_enums.h barely
uses its functionality. Stub out the minimum for CL.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Antonino Maniscalco <antonino.maniscalco@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26056>

src/compiler/shader_enums.h

@@ -26,9 +26,15 @@
 #ifndef SHADER_ENUMS_H
 #define SHADER_ENUMS_H
 
-#include "util/macros.h"
-
+#ifndef __OPENCL_VERSION__
 #include <stdbool.h>
+#include "util/macros.h"
+#include "util/u_debug.h"
+#else
+#define ENUM_PACKED
+#define BITFIELD_BIT(b) (1u << (b))
+#define debug_printf(x, ...)
+#endif
 
 /* Project-wide (GL and Vulkan) maximum. */
 #define MAX_DRAW_BUFFERS 8