Move MAX_PHYSICAL_CPUS to AMD k8 and fam10

This was always AMD-only and it was never properly used with AGESA.

Change-Id: Ifb461ee845e442f6cf90aca52470cfb66e862bfc
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5540
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

src/cpu/amd/model_10xxx/Kconfig

@@ -32,6 +32,10 @@ config SET_FIDVID
 	bool
 	default y
 
+config MAX_PHYSICAL_CPUS
+	int
+	default 1
+
 config LIFT_BSP_APIC_ID
 	bool
 	default n

src/cpu/amd/model_fxx/Kconfig

@@ -11,6 +11,10 @@ config UDELAY_IO
 	bool
 	default n
 
+config MAX_PHYSICAL_CPUS
+	int
+	default 1
+
 config LIFT_BSP_APIC_ID
 	bool
 	default n