powerpc/85xx: add T4080 SoC support

The T4080 SoC is a low-power version of the T4160.
T4080 combines 4 dual-threaded Power Architecture e6500
cores with single cluster and two memory complexes.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
diff --git a/arch/powerpc/cpu/mpc8xxx/cpu.c b/arch/powerpc/cpu/mpc8xxx/cpu.c
index 35795c4..dfedc53 100644
--- a/arch/powerpc/cpu/mpc8xxx/cpu.c
+++ b/arch/powerpc/cpu/mpc8xxx/cpu.c
@@ -62,6 +62,7 @@
 	CPU_TYPE_ENTRY(T4240, T4240, 0),
 	CPU_TYPE_ENTRY(T4120, T4120, 0),
 	CPU_TYPE_ENTRY(T4160, T4160, 0),
+	CPU_TYPE_ENTRY(T4080, T4080, 4),
 	CPU_TYPE_ENTRY(B4860, B4860, 0),
 	CPU_TYPE_ENTRY(G4860, G4860, 0),
 	CPU_TYPE_ENTRY(G4060, G4060, 0),