Don't parse mesa's rtasm asm module.
diff --git a/doxygen/gallium.doxy b/doxygen/gallium.doxy
index 3ef8c6c..1a38c8d 100644
--- a/doxygen/gallium.doxy
+++ b/doxygen/gallium.doxy
@@ -479,8 +479,7 @@
 
 INPUT                  = gallium.doc \
                          ../src/gallium \
-                         ../src/mesa/state_tracker \
-                         ../src/mesa/x86/rtasm
+                         ../src/mesa/state_tracker
 
 # This tag can be used to specify the character encoding of the source files that 
 # doxygen parses. Internally doxygen uses the UTF-8 encoding, which is also the default