imx: Convert SERIAL_TAG support to ENV_VARS_UBOOT_RUNTIME_CONFIG

No iMX platforms have supported ATAG-based booting.  They have however
re-used the CONFIG_SERIAL_TAG option as a way to enable support of
reading the OTP fuses and setting the serial# environment variable in
some cases.  Change the warp7 support to use this symbol, use this for
updating the rest of the imx7 code, and update the imx8 conditionals.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP i.MX U-Boot Team <uboot-imx@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/gwventana_emmc_defconfig b/configs/gwventana_emmc_defconfig
index d107432..000bdb5 100644
--- a/configs/gwventana_emmc_defconfig
+++ b/configs/gwventana_emmc_defconfig
@@ -79,6 +79,7 @@
 CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_SYS_MMC_ENV_PART=1
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_NETCONSOLE=y
 CONFIG_DM=y
 CONFIG_BOUNCE_BUFFER=y
diff --git a/configs/gwventana_gw5904_defconfig b/configs/gwventana_gw5904_defconfig
index f579d0f..87851f3 100644
--- a/configs/gwventana_gw5904_defconfig
+++ b/configs/gwventana_gw5904_defconfig
@@ -79,6 +79,7 @@
 CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_SYS_MMC_ENV_PART=1
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_NETCONSOLE=y
 CONFIG_DM=y
 CONFIG_BOUNCE_BUFFER=y
diff --git a/configs/gwventana_nand_defconfig b/configs/gwventana_nand_defconfig
index b587ade..ff5001e 100644
--- a/configs/gwventana_nand_defconfig
+++ b/configs/gwventana_nand_defconfig
@@ -81,6 +81,7 @@
 CONFIG_ENV_IS_IN_NAND=y
 CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_NETCONSOLE=y
 CONFIG_DM=y
 CONFIG_BOUNCE_BUFFER=y
diff --git a/configs/imx8ulp_evk_defconfig b/configs/imx8ulp_evk_defconfig
index 1c6288d..f156100 100644
--- a/configs/imx8ulp_evk_defconfig
+++ b/configs/imx8ulp_evk_defconfig
@@ -40,6 +40,7 @@
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_SPL_OF_CONTROL=y
 CONFIG_ENV_IS_IN_MMC=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_DM=y
 CONFIG_IMX_RGPIO2P=y
diff --git a/configs/puma-rk3399_defconfig b/configs/puma-rk3399_defconfig
index a0a3059..afc54fe 100644
--- a/configs/puma-rk3399_defconfig
+++ b/configs/puma-rk3399_defconfig
@@ -46,6 +46,7 @@
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_SYS_MMC_ENV_DEV=1
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_ROCKCHIP_GPIO=y
 CONFIG_SYS_I2C_ROCKCHIP=y
diff --git a/configs/warp7_bl33_defconfig b/configs/warp7_bl33_defconfig
index e260bbe..d127a4f 100644
--- a/configs/warp7_bl33_defconfig
+++ b/configs/warp7_bl33_defconfig
@@ -32,6 +32,7 @@
 CONFIG_OF_CONTROL=y
 CONFIG_ENV_OVERWRITE=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_BOUNCE_BUFFER=y
 CONFIG_DFU_MMC=y
diff --git a/configs/warp7_defconfig b/configs/warp7_defconfig
index 1b77528..4b339b4 100644
--- a/configs/warp7_defconfig
+++ b/configs/warp7_defconfig
@@ -38,6 +38,7 @@
 CONFIG_OF_CONTROL=y
 CONFIG_ENV_OVERWRITE=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_BOUNCE_BUFFER=y
 CONFIG_DFU_MMC=y