They're supported by the model_6bx code...

Signed-off-by: <stepan@coresystems.de>

Index: src/cpu/intel/model_6xx/model_6xx_init.c
===================================================================
--- src/cpu/intel/model_6xx/model_6xx_init.c    (revision 5456)
+++ src/cpu/intel/model_6xx/model_6xx_init.c    (working copy)
@@ -57,9 +57,6 @@
     { X86_VENDOR_INTEL, 0x06A0 },
     { X86_VENDOR_INTEL, 0x06A1 },
     { X86_VENDOR_INTEL, 0x06A4 },
-    { X86_VENDOR_INTEL, 0x06B0 }, /* Mobile Celeron FCBGA */
-    { X86_VENDOR_INTEL, 0x06B1 }, /* Celeron (Tualatin) */
-    { X86_VENDOR_INTEL, 0x06B4 },
     { 0, 0 },
 };