imx: Support i.MX93 9X9 QSB board

Add i.MX93 9x9 Quick Start Board support.
 - Two ddr scripts included w/o inline ecc feature.
 - SDHC/NETWORK/I2C/UART supported
 - PCA9450 supported, default over drive mode
 - Documentation added.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/ddr/imx/imx9/Kconfig b/drivers/ddr/imx/imx9/Kconfig
index b1795ee..0a45340 100644
--- a/drivers/ddr/imx/imx9/Kconfig
+++ b/drivers/ddr/imx/imx9/Kconfig
@@ -17,6 +17,11 @@
 	help
 	  Enable DDR controller performance monitor counter for reference events.
 
+config IMX9_DRAM_INLINE_ECC
+	bool "Enable DDR INLINE ECC feature"
+	help
+	  Select to enable DDR INLINE ECC feature
+
 config SAVED_DRAM_TIMING_BASE
 	hex "Define the base address for saved dram timing"
 	help