configs: ls1012a: Unset ENV_ADDR value

LS1012A-FRWY and LS1012A-RDB crashes in flash environment when
CONFIG_ENV_ADDR value is set. Unset the config value in *_tfa_defconfig*
to resolve booting crash.

Following crash is observed:
    Using SERDES1 Protocol: 13576 (0x3508)
    "Synchronous Abort" handler, esr 0x96000006
    elr: 00000000820452c0 lr : 0000000082013f54 (reloc)
    elr: 00000000b7b932c0 lr : 00000000b7b61f54
    x0 : 0000000000000000 x1 : 000000007604e004
    x2 : 0000000000000001 x3 : 0000000000000000
    ...
    Code: 54ffff80 9100c000 17fffff7 f9402241 (3860c820)
    Resetting CPU ...

Signed-off-by: Kuldeep Singh <kuldeep.singh@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/configs/ls1012afrwy_tfa_defconfig b/configs/ls1012afrwy_tfa_defconfig
index f4cbbf2..2948fd5 100644
--- a/configs/ls1012afrwy_tfa_defconfig
+++ b/configs/ls1012afrwy_tfa_defconfig
@@ -34,7 +34,6 @@
 CONFIG_OF_CONTROL=y
 CONFIG_DEFAULT_DEVICE_TREE="fsl-ls1012a-frwy"
 CONFIG_ENV_IS_IN_SPI_FLASH=y
-CONFIG_ENV_ADDR=0x401D0000
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM=y
diff --git a/configs/ls1012ardb_tfa_defconfig b/configs/ls1012ardb_tfa_defconfig
index 3837d32..e0d203d 100644
--- a/configs/ls1012ardb_tfa_defconfig
+++ b/configs/ls1012ardb_tfa_defconfig
@@ -35,7 +35,6 @@
 CONFIG_OF_CONTROL=y
 CONFIG_DEFAULT_DEVICE_TREE="fsl-ls1012a-rdb"
 CONFIG_ENV_IS_IN_SPI_FLASH=y
-CONFIG_ENV_ADDR=0x40500000
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM=y