arc: No need in sections defined in sources with newer tools

Starting from arc-2016.03 GNU tools linker properly works with
symbols defined in linker script and so external declarations
are no longer required, dump them.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
diff --git a/arch/arc/lib/relocate.c b/arch/arc/lib/relocate.c
index 7709633..7802f40 100644
--- a/arch/arc/lib/relocate.c
+++ b/arch/arc/lib/relocate.c
@@ -6,7 +6,10 @@
 
 #include <common.h>
 #include <elf.h>
-#include <asm/sections.h>
+#include <asm-generic/sections.h>
+
+extern ulong __image_copy_start;
+extern ulong __ivt_end;
 
 DECLARE_GLOBAL_DATA_PTR;