The weak mxs_adjust_memory_params function is called from spl_mem_init.c,
so it must be linked into the SPL to have an effect. Move it from
mx23_olinuxino.c to spl_boot.c.
This change was verified by reading back the register values.
Signed-off-by: Jan Luebbe <firstname.lastname@example.org>
Cc: Marek Vasut <email@example.com>
Cc: Stefano Babic <firstname.lastname@example.org>