It should be "insert_hw_breakpoint" rather than "insert_hw_watchpoint".
gdb:
2015-07-02  Yao Qi  <yao.qi@linaro.org>
	* aarch64-linux-nat.c (aarch64_linux_insert_hw_breakpoint): Fix
	typo in the debugging message.
+2015-07-02  Yao Qi  <yao.qi@linaro.org>
+
+       * aarch64-linux-nat.c (aarch64_linux_insert_hw_breakpoint): Fix
+       typo in the debugging message.
+
 2015-07-02  Markus Metzger  <markus.t.metzger@intel.com>
 
        * btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
 
        = aarch64_get_debug_reg_state (ptid_get_pid (inferior_ptid));
 
       aarch64_show_debug_reg_state (state,
-                                   "insert_hw_watchpoint", addr, len, type);
+                                   "insert_hw_breakpoint", addr, len, type);
     }
 
   return ret;