Use one menu to hide the several i.MX8M DDR options from device driver entry. Signed-off-by: Peng Fan <peng.fan@nxp.com>
Introduce DDR driver for i.MX8M. The driver will be used by SPL to initialze DDR PHY and DDR Controller. Signed-off-by: Peng Fan <peng.fan@nxp.com>