powerpc: T2080, T2081: Remove macro CONFIG_PPC_T2080 and CONFIG_PPC_T2081

Use CONFIG_ARCH_T2080 and CONFIG_ARCH_T2081 instead.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/configs/T2080RDB_SECURE_BOOT_defconfig b/configs/T2080RDB_SECURE_BOOT_defconfig
index e5323c4..4675ac6 100644
--- a/configs/T2080RDB_SECURE_BOOT_defconfig
+++ b/configs/T2080RDB_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_T2080,SECURE_BOOT"
+CONFIG_SYS_EXTRA_OPTIONS="SECURE_BOOT"
 CONFIG_BOOTDELAY=10
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_MEMTEST=y