powerpc/p5020: Add various p5020 related defines (and p5010)

There are various locations that we have chip specific info:

* Makefile for which ddr code to build
* Added p5020 & p5010 to cpu_type_list and SVR list
* Added number of LAWs for p5020
* Set CONFIG_MAX_CPUS to 2 for p5020

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/config.h b/arch/powerpc/include/asm/config.h
index d88c282..f2f4188 100644
--- a/arch/powerpc/include/asm/config.h
+++ b/arch/powerpc/include/asm/config.h
@@ -46,6 +46,8 @@
 #define CONFIG_MAX_CPUS		2
 #elif defined(CONFIG_PPC_P4080)
 #define CONFIG_MAX_CPUS		8
+#elif defined(CONFIG_PPC_P5020)
+#define CONFIG_MAX_CPUS		2
 #else
 #define CONFIG_MAX_CPUS		1
 #endif