powerpc: BSC9132QDS: Remove CONFIG_BSC9132QDS macro

Use CONFIG_TARGET_BSC9132QDS from Kconfig option, remove CONFIG_BSC9132QDS
macro.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/configs/BSC9132QDS_NAND_DDRCLK133_defconfig b/configs/BSC9132QDS_NAND_DDRCLK133_defconfig
index 29646d2..e44aac3 100644
--- a/configs/BSC9132QDS_NAND_DDRCLK133_defconfig
+++ b/configs/BSC9132QDS_NAND_DDRCLK133_defconfig
@@ -7,7 +7,7 @@
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_SYS_EXTRA_OPTIONS="BSC9132QDS,NAND,SYS_CLK_100_DDR_133"
+CONFIG_SYS_EXTRA_OPTIONS="NAND,SYS_CLK_100_DDR_133"
 CONFIG_BOOTDELAY=10
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
 CONFIG_SPL=y