arch/tile: set CORE_DUMP_USE_REGSET on tile

Following the previous patch which adds support for user_regset, tile
can now use this feature.

Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
diff --git a/arch/tile/include/asm/elf.h b/arch/tile/include/asm/elf.h
index f8ccf08..2b43fa0 100644
--- a/arch/tile/include/asm/elf.h
+++ b/arch/tile/include/asm/elf.h
@@ -169,4 +169,6 @@
 
 #endif /* CONFIG_COMPAT */
 
+#define CORE_DUMP_USE_REGSET
+
 #endif /* _ASM_TILE_ELF_H */