
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>