imx: imx9: Add gpio registers structure

Add GPIO registers structure for iMX93, so that we can enable lpgpio
driver

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>

arch/arm/Kconfig

@@ -916,6 +916,7 @@ config ARCH_IMX9
 	select DM
 	select MACH_IMX
 	select SUPPORT_SPL
+	select GPIO_EXTRA_HEADER
 	select MISC
 	select IMX_SENTINEL
 	imply CMD_DM

arch/arm/include/asm/arch-imx9/gpio.h

@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2022 NXP
+ */
+
+#ifndef __ASM_ARCH_IMX9_GPIO_H
+#define __ASM_ARCH_IMX9_GPIO_H
+
+struct gpio_regs {
+	u32 gpio_pdor;
+	u32 gpio_psor;
+	u32 gpio_pcor;
+	u32 gpio_ptor;
+	u32 gpio_pdir;
+	u32 gpio_pddr;
+	u32 gpio_pidr;
+	u8 gpio_pxdr[32];
+};
+
+#endif