Since i.MX6QP changes some CCM registers, so modify the clocks settings to
follow the hardware changes.

In c files, use runtime check and discard #ifdef.
Signed-off-by: NPeng Fan <Peng.Fan@freescale.com>
Signed-off-by: NYe.Li <B37916@freescale.com>
Reviewed-by: NFabio Estevam <fabio.estevam@freescale.com>
Acked-by: NStefano Babic <sbabic@denx.de>