Some board ports place TEXT_BASE at a location that would cause the
RESET_VECTOR_ADDRESS not to be at 0xfffffffc when we link.  By default
we assume RESET_VECTOR_ADDRESS will be 0xfffffffc if the board doesn't
explicitly set it.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
Acked-by: NWolfgang Denk <wd@denx.de>