powerpc/p2040: Add various p2040 specific information

Add P2040 SoC specific information:
* SERDES Table
* Added p2040 to cpu_type_list and SVR list
* Added number of LAWs for p2040
* Set CONFIG_MAX_CPUS to 4 for p2040

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/cpu/mpc8xxx/cpu.c b/arch/powerpc/cpu/mpc8xxx/cpu.c
index 94051de..4335fb4 100644
--- a/arch/powerpc/cpu/mpc8xxx/cpu.c
+++ b/arch/powerpc/cpu/mpc8xxx/cpu.c
@@ -84,6 +84,8 @@
 	CPU_TYPE_ENTRY(P2010, P2010_E, 1),
 	CPU_TYPE_ENTRY(P2020, P2020, 2),
 	CPU_TYPE_ENTRY(P2020, P2020_E, 2),
+	CPU_TYPE_ENTRY(P2040, P2040, 4),
+	CPU_TYPE_ENTRY(P2040, P2040_E, 4),
 	CPU_TYPE_ENTRY(P3041, P3041, 4),
 	CPU_TYPE_ENTRY(P3041, P3041_E, 4),
 	CPU_TYPE_ENTRY(P4040, P4040, 4),