The base of DRAM will be changed for the next generation SoC. To support it along with existing SoCs in the single defconfig, set 'loadaddr' at boot-time by adding the offset to the DRAM base. CONFIG_SYS_LOAD_ADDR is still hard-coded for compilation, but the value from environment variable 'loadaddr' should be used. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>