Add these files to the sdk:

cbf32.h cfb16.h cfbmap.h cfbunmap.h cfbunmap.h cfbmskbits.h xf86sbusBus.h
    mifillarch.h mispans.h

hw/xfree86/common/Makefile.am

@@ -62,7 +62,8 @@ INCLUDES = $(XORG_INCS) -I$(srcdir)/../ddc -I$(srcdir)/../i2c \
 sdk_HEADERS = compiler.h fourcc.h xf86.h xf86Module.h xf86Opt.h \
                xf86PciInfo.h xf86Priv.h xf86Privstr.h xf86Resources.h \
                xf86cmap.h xf86fbman.h xf86str.h $(XISDKINCS) \
-               $(XVSDKINCS) atKeynames.h xf86Version.h xorgVersion.h
+               $(XVSDKINCS) atKeynames.h xf86Version.h xorgVersion.h \
+               xf86sbusBus.h
 
 DISTCLEANFILES = xf86Build.h
 
@@ -87,7 +88,6 @@ EXTRA_DIST = \
 	xf86cmap.h \
 	xf86fbman.h \
 	xf86pciBus.h \
-	xf86sbusBus.h \
 	xf86str.h \
 	xf86xv.h \
 	xf86xvmc.h \