assembler: Update the disassembler code

From Mesa. This imports a bit more the of brw_eu* infrastructure (which
is going towards the right direction!) from mesa and the update is quite
a significant improvement over what we had.

I also verified that the changes that were done on the assembler old
version of brw_disasm.c were already supported by the Mesa version, and
indeed they were.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

assembler/Makefile.am

@@ -11,6 +11,8 @@ gram.h: gram.c
 
 intel_gen4asm_SOURCES =	\
 	brw_defines.h	\
+	brw_eu.h	\
+	brw_reg.h	\
 	brw_structs.h	\
 	gen4asm.h	\
 	gram.y		\
@@ -19,7 +21,7 @@ intel_gen4asm_SOURCES =	\
 	$(NULL)
 
 intel_gen4disasm_SOURCES =  \
-	disasm.c disasm-main.c
+	brw_disasm.c disasm-main.c
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = intel-gen4asm.pc