arm: Disable ATAGs support

With the exceptions of ds109, ds414, icnova-a20-swac, nokia_rx51 and
stemmy, disable ATAG support.  A large number of platforms had enabled
support but never supported a kernel so old as to require it.  Further,
some platforms are old enough to support both, but are well supported by
devicetree booting, and have been for a number of years.  This is
because some of the ATAGs related functions have been re-used to provide
the same kind of information, but for devicetree or just generally to
inform the user.  When needed still, rename these functions to
get_board_revision() instead, to avoid conflicts.  In other cases, these
functions were simply unused, so drop them.

Cc: Andre Przywara <andre.przywara@arm.com>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Cc: Phil Sutter <phil@nwl.cc>
Cc: Stefan Bosch <stefan_b@posteo.net>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/toradex/apalis_imx6/apalis_imx6.c b/board/toradex/apalis_imx6/apalis_imx6.c
index 74060da..f4cd28d 100644
--- a/board/toradex/apalis_imx6/apalis_imx6.c
+++ b/board/toradex/apalis_imx6/apalis_imx6.c
@@ -707,12 +707,11 @@
 #ifdef CONFIG_BOARD_LATE_INIT
 int board_late_init(void)
 {
-#if defined(CONFIG_REVISION_TAG) && \
-    defined(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)
+#if defined(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)
 	char env_str[256];
 	u32 rev;
 
-	rev = get_board_rev();
+	rev = get_board_revision();
 	snprintf(env_str, ARRAY_SIZE(env_str), "%.4x", rev);
 	env_set("board_rev", env_str);
 
diff --git a/board/toradex/colibri_imx6/colibri_imx6.c b/board/toradex/colibri_imx6/colibri_imx6.c
index 587d92a..3b55f6c 100644
--- a/board/toradex/colibri_imx6/colibri_imx6.c
+++ b/board/toradex/colibri_imx6/colibri_imx6.c
@@ -611,12 +611,11 @@
 #ifdef CONFIG_BOARD_LATE_INIT
 int board_late_init(void)
 {
-#if defined(CONFIG_REVISION_TAG) && \
-    defined(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)
+#if defined(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)
 	char env_str[256];
 	u32 rev;
 
-	rev = get_board_rev();
+	rev = get_board_revision();
 	snprintf(env_str, ARRAY_SIZE(env_str), "%.4x", rev);
 	env_set("board_rev", env_str);
 #endif
diff --git a/board/toradex/common/tdx-common.c b/board/toradex/common/tdx-common.c
index 061abf7..9db4553 100644
--- a/board/toradex/common/tdx-common.c
+++ b/board/toradex/common/tdx-common.c
@@ -32,8 +32,8 @@
 static char *tdx_carrier_board_name;
 #endif
 
-#ifdef CONFIG_REVISION_TAG
-u32 get_board_rev(void)
+#if defined(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)
+u32 get_board_revision(void)
 {
 	/* Check validity */
 	if (!tdx_hw_tag.ver_major)
@@ -183,8 +183,8 @@
 
 #else /* CONFIG_TDX_CFG_BLOCK */
 
-#ifdef CONFIG_REVISION_TAG
-u32 get_board_rev(void)
+#if defined(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)
+u32 get_board_revision(void)
 {
 	return 0;
 }
diff --git a/board/toradex/common/tdx-common.h b/board/toradex/common/tdx-common.h
index 8020df5..c96e875 100644
--- a/board/toradex/common/tdx-common.h
+++ b/board/toradex/common/tdx-common.h
@@ -10,6 +10,7 @@
 #define TDX_USB_VID			0x1B67
 
 int ft_common_board_setup(void *blob, struct bd_info *bd);
+u32 get_board_revision(void);
 
 #if defined(CONFIG_DM_VIDEO)
 int show_boot_logo(void);