configs: ls1012ardb: Enable CONFIG_SYS_RELOC_GD_ENV_ADDR

Enable the config for ls1012ardb as the entry got missed earlier.

Fixes: 8d8ee47e ("env: Add CONFIG_SYS_RELOC_GD_ENV_ADDR symbol")
Signed-off-by: Kuldeep Singh <kuldeep.singh@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>