ppc/p4080: Add various p4080 related defines (and p4040)

There are various locations that we have chip specific info:

* Makefile for which ddr code to build
* Added p4080 & p4040 to cpu_type_list and SVR list
* Added number of LAWs for p4080
* Set CONFIG_MAX_CPUS to 8 for p4080

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/cpu/mpc85xx/Makefile b/cpu/mpc85xx/Makefile
index 3ef00e8..56de7eb 100644
--- a/cpu/mpc85xx/Makefile
+++ b/cpu/mpc85xx/Makefile
@@ -53,6 +53,7 @@
 COBJS-$(CONFIG_P1020)	+= ddr-gen3.o
 COBJS-$(CONFIG_P2010)	+= ddr-gen3.o
 COBJS-$(CONFIG_P2020)	+= ddr-gen3.o
+COBJS-$(CONFIG_PPC_P4080)	+= ddr-gen3.o
 
 COBJS-$(CONFIG_CPM2)	+= ether_fcc.o
 COBJS-$(CONFIG_OF_LIBFDT) += fdt.o