arc: Update default target CPU to match GCC defaults

Signed-off-by: Claudiu Zissulescu <claziss@gmail.com>
diff --git a/gas/config/tc-arc.c b/gas/config/tc-arc.c
index 8d16cb5..d9b13a0 100644
--- a/gas/config/tc-arc.c
+++ b/gas/config/tc-arc.c
@@ -49,7 +49,7 @@
 			  && (SUB_OPCODE (x) == 0x28))
 
 #ifndef TARGET_WITH_CPU
-#define TARGET_WITH_CPU "arc700"
+#define TARGET_WITH_CPU "hs38_linux"
 #endif /* TARGET_WITH_CPU */
 
 #define ARC_GET_FLAG(s)   	(*symbol_get_tc (s))