powerpc: T4160: Remove macro CONFIG_PPC_T4160

Use CONFIG_ARCH_T4160 instead.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/configs/T4160QDS_NAND_defconfig b/configs/T4160QDS_NAND_defconfig
index fa3b36c..2d2297b 100644
--- a/configs/T4160QDS_NAND_defconfig
+++ b/configs/T4160QDS_NAND_defconfig
@@ -12,7 +12,7 @@
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_SYS_EXTRA_OPTIONS="PPC_T4160,RAMBOOT_PBL,SPL_FSL_PBL,NAND"
+CONFIG_SYS_EXTRA_OPTIONS="RAMBOOT_PBL,SPL_FSL_PBL,NAND"
 CONFIG_BOOTDELAY=10
 CONFIG_SPL=y
 CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT=y
diff --git a/configs/T4160QDS_SDCARD_defconfig b/configs/T4160QDS_SDCARD_defconfig
index be96916..95a2a3f 100644
--- a/configs/T4160QDS_SDCARD_defconfig
+++ b/configs/T4160QDS_SDCARD_defconfig
@@ -12,7 +12,7 @@
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_SYS_EXTRA_OPTIONS="PPC_T4160,RAMBOOT_PBL,SPL_FSL_PBL,SDCARD"
+CONFIG_SYS_EXTRA_OPTIONS="RAMBOOT_PBL,SPL_FSL_PBL,SDCARD"
 CONFIG_BOOTDELAY=10
 CONFIG_SPL=y
 CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT=y
diff --git a/configs/T4160QDS_SECURE_BOOT_defconfig b/configs/T4160QDS_SECURE_BOOT_defconfig
index 71debf2..36940e4 100644
--- a/configs/T4160QDS_SECURE_BOOT_defconfig
+++ b/configs/T4160QDS_SECURE_BOOT_defconfig
@@ -6,7 +6,7 @@
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_SYS_EXTRA_OPTIONS="PPC_T4160,SECURE_BOOT"
+CONFIG_SYS_EXTRA_OPTIONS="SECURE_BOOT"
 CONFIG_BOOTDELAY=10
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_GREPENV=y
diff --git a/configs/T4160QDS_defconfig b/configs/T4160QDS_defconfig
index 6a169c5..46ec844 100644
--- a/configs/T4160QDS_defconfig
+++ b/configs/T4160QDS_defconfig
@@ -5,7 +5,6 @@
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_SYS_EXTRA_OPTIONS="PPC_T4160"
 CONFIG_BOOTDELAY=10
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_GREPENV=y
diff --git a/configs/T4160RDB_defconfig b/configs/T4160RDB_defconfig
index 2405ac4..b768368 100644
--- a/configs/T4160RDB_defconfig
+++ b/configs/T4160RDB_defconfig
@@ -5,7 +5,6 @@
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_SYS_EXTRA_OPTIONS="PPC_T4160"
 CONFIG_BOOTDELAY=10
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_GREPENV=y