Intel cpus: use CPU_ADDR_BITS from Kconfig during CAR

Default CPU_ADDR_BITS is 36.

For Atom (model_106cx) use 32. This model is known to
fail execution-in-place (XIP) with the default 36.

Pentium M should use 32, but doesn't even with this patch.
Some Xeon and CORE(2) models should use 38 or 40.

Change-Id: If604badcdc578c4f4bc7d30da2f61397ec0d754c
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/639
Tested-by: build bot (Jenkins)
Reviewed-by: Sven Schnelle <svens@stackframe.org>

src/cpu/intel/model_106cx/Kconfig

@@ -3,3 +3,12 @@ config CPU_INTEL_MODEL_106CX
 	select SMP
 	select SSE2
 	select UDELAY_LAPIC
+
+if CPU_INTEL_MODEL_106CX
+
+config CPU_ADDR_BITS
+	int
+	default 32
+
+endif
+