powerpc: T208XQDS: Split as T2080QDS and T2081QDS

Use two separated targets in Kconfig to simplify configurations.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/arch/powerpc/cpu/mpc85xx/Kconfig b/arch/powerpc/cpu/mpc85xx/Kconfig
index 9206b9b..abd7349 100644
--- a/arch/powerpc/cpu/mpc85xx/Kconfig
+++ b/arch/powerpc/cpu/mpc85xx/Kconfig
@@ -242,8 +242,8 @@
 	select SUPPORT_SPL
 	select PHYS_64BIT
 
-config TARGET_T208XQDS
-	bool "Support T208xQDS"
+config TARGET_T2080QDS
+	bool "Support T2080QDS"
 	select SUPPORT_SPL
 	select PHYS_64BIT
 
@@ -252,6 +252,11 @@
 	select SUPPORT_SPL
 	select PHYS_64BIT
 
+config TARGET_T2081QDS
+	bool "Support T2081QDS"
+	select SUPPORT_SPL
+	select PHYS_64BIT
+
 config TARGET_T4240QDS
 	bool "Support T4240QDS"
 	select SUPPORT_SPL