imx: Support i.MX91 11x11 EVK board

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>
diff --git a/arch/arm/mach-imx/imx9/Kconfig b/arch/arm/mach-imx/imx9/Kconfig
index 4554e21..54c6b11 100644
--- a/arch/arm/mach-imx/imx9/Kconfig
+++ b/arch/arm/mach-imx/imx9/Kconfig
@@ -29,6 +29,12 @@
 	prompt  "NXP i.MX9 board select"
 	optional
 
+config TARGET_IMX91_11X11_EVK
+	bool "imx91_11x11_evk"
+	select OF_BOARD_FIXUP
+	select IMX91
+	imply OF_UPSTREAM
+
 config TARGET_IMX93_9X9_QSB
 	bool "imx93_qsb"
 	select OF_BOARD_FIXUP
@@ -56,6 +62,7 @@
 
 endchoice
 
+source "board/freescale/imx91_evk/Kconfig"
 source "board/freescale/imx93_evk/Kconfig"
 source "board/freescale/imx93_qsb/Kconfig"
 source "board/phytec/phycore_imx93/Kconfig"