Add i.MX91 11x11 EVK Board support.
- Four ddr scripts included w/o inline ecc feature.
- SDHC/NETWORK/I2C/UART supported
- PCA9451 supported, default nominal drive mode
- Documentation added.
Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit ff9f080e59)