board/freescale: Use unified setup_ddr_tlbs for spl boot and non-spl boot

We should use unified setup_ddr_tlbs() for spl boot and non-spl boot
to make sure 'M' bit is set for DDR TLB to maintain cache coherence.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>