Use TARGET_T4160RDB to simplify Kconfig options.
Signed-off-by: York Sun <york.sun@nxp.com>
        select SUPPORT_SPL
        select PHYS_64BIT
 
+config TARGET_T4160RDB
+       bool "Support T4160RDB"
+       select SUPPORT_SPL
+       select PHYS_64BIT
+
 config TARGET_T4240QDS
        bool "Support T4240QDS"
        select SUPPORT_SPL
 
-if TARGET_T4240RDB
+if TARGET_T4160RDB || TARGET_T4240RDB
 
 config SYS_BOARD
        default "t4rdb"
 
 ifdef CONFIG_SPL_BUILD
 obj-y  += spl.o
 else
+obj-$(CONFIG_TARGET_T4160RDB)  += t4240rdb.o
 obj-$(CONFIG_T4240RDB) += t4240rdb.o
 obj-y                  += cpld.o
 obj-y                  += eth.o
 
 CONFIG_PPC=y
 CONFIG_MPC85xx=y
-CONFIG_TARGET_T4240RDB=y
+CONFIG_TARGET_T4160RDB=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y