configs/lx2160a: Add CONFIG_ENV_SECT_SIZE in defconfig

Define CONFIG_ENV_SECT_SIZE as 0x20000 in lx2160a related defconfigs:
lx2160ardb_tfa_defconfig, lx2160ardb_tfa_SECURE_BOOT_defconfig,
lx2160aqds_tfa_defconfig, lx2160aqds_tfa_SECURE_BOOT_defconfig

Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/configs/lx2160aqds_tfa_defconfig b/configs/lx2160aqds_tfa_defconfig
index a35f1cc..8f2cfad 100644
--- a/configs/lx2160aqds_tfa_defconfig
+++ b/configs/lx2160aqds_tfa_defconfig
@@ -4,6 +4,7 @@
 CONFIG_SYS_TEXT_BASE=0x82000000
 CONFIG_SYS_MALLOC_F_LEN=0x6000
 CONFIG_ENV_SIZE=0x2000
+CONFIG_ENV_SECT_SIZE=0x20000
 CONFIG_ENV_OFFSET=0x500000
 CONFIG_NR_DRAM_BANKS=3
 CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT=y