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/include/configs/imx93_qsb.h b/include/configs/imx93_qsb.h
new file mode 100644
index 0000000..5ddc191
--- /dev/null
+++ b/include/configs/imx93_qsb.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2024 NXP
+ */
+
+#ifndef __IMX93_QSB_H
+#define __IMX93_QSB_H
+
+#define CFG_SYS_UBOOT_BASE	\
+	(QSPI0_AMBA_BASE + CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR * 512)
+
+#ifdef CONFIG_SPL_BUILD
+#define CFG_MALLOC_F_ADDR	0x204D0000
+#endif
+
+#define CFG_SYS_INIT_RAM_ADDR	0x80000000
+#define CFG_SYS_INIT_RAM_SIZE	0x200000
+
+#define CFG_SYS_SDRAM_BASE	0x80000000
+#define PHYS_SDRAM		0x80000000
+#define PHYS_SDRAM_SIZE		0x80000000 /* 2GB DDR */
+
+#define WDOG_BASE_ADDR		WDG3_BASE_ADDR
+
+#endif