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/friendlyarm/nanopi2/board.c b/board/friendlyarm/nanopi2/board.c
index c0fe2d5..70e4dfc 100644
--- a/board/friendlyarm/nanopi2/board.c
+++ b/board/friendlyarm/nanopi2/board.c
@@ -295,12 +295,12 @@
 	env_set("ethaddr", ethaddr);
 }
 
-#ifdef CONFIG_REVISION_TAG
+#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 static void set_board_rev(void)
 {
 	char info[64] = {0, };
 
-	snprintf(info, ARRAY_SIZE(info), "%02x", get_board_rev());
+	snprintf(info, ARRAY_SIZE(info), "%02x", get_board_revision());
 	env_set("board_rev", info);
 }
 #endif
@@ -310,7 +310,7 @@
 	char info[64] = {0, };
 
 	snprintf(info, ARRAY_SIZE(info),
-		 "s5p4418-nanopi2-rev%02x.dtb", get_board_rev());
+		 "s5p4418-nanopi2-rev%02x.dtb", get_board_revision());
 	env_set("dtb_name", info);
 }
 
@@ -436,7 +436,7 @@
 {
 	bd_update_env();
 
-#ifdef CONFIG_REVISION_TAG
+#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 	set_board_rev();
 #endif
 	set_dtb_name();