compiler: move TEXTURE_COORD/VERTEX_GENERIC_ATTRIB limits into shader_enums.h

because they are used there.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9050>

src/compiler/shader_enums.h

@@ -166,6 +166,14 @@ typedef enum
 
 const char *gl_vert_attrib_name(gl_vert_attrib attrib);
 
+/**
+ * Max number of texture coordinate units.  This mainly just applies to
+ * the fixed-function vertex code.  This will be difficult to raise above
+ * eight because of various vertex attribute bitvectors.
+ */
+#define MAX_TEXTURE_COORD_UNITS     8
+#define MAX_VERTEX_GENERIC_ATTRIBS  16
+
 /**
  * Symbolic constats to help iterating over
  * specific blocks of vertex attributes.