arm: use CONFIG_SUPPORT_PASSING_ATAGS

Simplify the bootm and the spl code by using the new config
CONFIG_SUPPORT_PASSING_ATAGS.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/include/asm/bootm.h b/arch/arm/include/asm/bootm.h
index 27f183b..439e43c 100644
--- a/arch/arm/include/asm/bootm.h
+++ b/arch/arm/include/asm/bootm.h
@@ -10,11 +10,7 @@
 
 extern void udc_disconnect(void);
 
-#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
-		defined(CONFIG_CMDLINE_TAG) || \
-		defined(CONFIG_INITRD_TAG) || \
-		defined(CONFIG_SERIAL_TAG) || \
-		defined(CONFIG_REVISION_TAG)
+#ifdef CONFIG_SUPPORT_PASSING_ATAGS
 # define BOOTM_ENABLE_TAGS		1
 #else
 # define BOOTM_ENABLE_TAGS		0