imx: mx7: move mmc env code to mmc_env.c

The mx7 mmc env code is shared by i.MX8M, so move it to mmc_env.c.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

arch/arm/mach-imx/Makefile

@@ -22,6 +22,7 @@ endif
 ifeq ($(SOC),$(filter $(SOC),mx7))
 obj-y 	+= cpu.o
 obj-$(CONFIG_SYS_I2C_MXC) += i2c-mxv7.o
+obj-$(CONFIG_ENV_IS_IN_MMC) += mmc_env.o
 endif
 ifeq ($(SOC),$(filter $(SOC),mx6 mx7))
 obj-y 	+= cache.o init.o

arch/arm/mach-imx/mmc_env.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2017 NXP
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/io.h>
+#include <asm/mach-imx/boot_mode.h>
+
+__weak int board_mmc_get_env_dev(int devno)
+{
+	return CONFIG_SYS_MMC_ENV_DEV;
+}
+
+int mmc_get_env_dev(void)
+{
+	struct bootrom_sw_info **p =
+		(struct bootrom_sw_info **)(ulong)ROM_SW_INFO_ADDR;
+	int devno = (*p)->boot_dev_instance;
+	u8 boot_type = (*p)->boot_dev_type;
+
+	/* If not boot from sd/mmc, use default value */
+	if ((boot_type != BOOT_TYPE_SD) && (boot_type != BOOT_TYPE_MMC))
+		return CONFIG_SYS_MMC_ENV_DEV;
+
+	return board_mmc_get_env_dev(devno);
+}

arch/arm/mach-imx/mx7/soc.c

@@ -250,27 +250,6 @@ const struct boot_mode soc_boot_modes[] = {
 	{NULL,		0},
 };
 
-#ifdef CONFIG_ENV_IS_IN_MMC
-__weak int board_mmc_get_env_dev(int devno)
-{
-	return CONFIG_SYS_MMC_ENV_DEV;
-}
-
-int mmc_get_env_dev(void)
-{
-	struct bootrom_sw_info **p =
-		(struct bootrom_sw_info **)ROM_SW_INFO_ADDR;
-	int devno = (*p)->boot_dev_instance;
-	u8 boot_type = (*p)->boot_dev_type;
-
-	/* If not boot from sd/mmc, use default value */
-	if ((boot_type != BOOT_TYPE_SD) && (boot_type != BOOT_TYPE_MMC))
-		return CONFIG_SYS_MMC_ENV_DEV;
-
-	return board_mmc_get_env_dev(devno);
-}
-#endif
-
 void s_init(void)
 {
 #if !defined CONFIG_SPL_BUILD