armv7a: rename l2_cache to outer_cache

The outer cache is not necessarily at L2 in a system. Rename functions
to make that clear.

Change-Id: Ia636a4844f50634f2bdf5cdce285febc1a47c11f
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3020
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>

src/target/armv7a.h

@@ -73,8 +73,8 @@ struct armv7a_cache_common {
 	int d_u_cache_enabled;
 	int auto_cache_enabled;			/* openocd automatic
 						 * cache handling */
-	/* l2 external unified cache if some */
-	void *l2_cache;
+	/* outer unified cache if some */
+	void *outer_cache;
 	int (*flush_all_data_cache)(struct target *target);
 	int (*display_cache_info)(struct command_context *cmd_ctx,
 			struct armv7a_cache_common *armv7a_cache);