6345 remove xhat support

@@ -79,11 +79,10 @@
 CORE_OBJS +=    promif_version.o
 CORE_OBJS +=    sfmmu_kdi.o
 CORE_OBJS +=    suspend.o
 CORE_OBJS +=    swtch.o
 CORE_OBJS +=    wdt.o
-CORE_OBJS +=    xhat_sfmmu.o
 
 CORE_OBJS +=    mdesc_diff.o
 CORE_OBJS +=    mdesc_findname.o
 CORE_OBJS +=    mdesc_findnodeprop.o
 CORE_OBJS +=    mdesc_fini.o