Without this definition, fsl_esdhc will access reserved registers
on i.MX chips, so define ARCH_MXC to fix it.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Refactor dram_pll_init to accept args to configure different pll freq.
Introduce dram_enable_bypass and dram_disable_bypass
Signed-off-by: Peng Fan <peng.fan@nxp.com>