STM32x: issue warning when unlocking device (bug #16)

Issue warning to user when unlocking or writing the option bytes.
The new settings will not take effect until a target reset.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>

src/flash/nor/stm32x.c

@@ -978,7 +978,9 @@ COMMAND_HANDLER(stm32x_handle_unlock_command)
 		return ERROR_OK;
 	}
 
-	command_print(CMD_CTX, "stm32x unlocked");
+	command_print(CMD_CTX, "stm32x unlocked.\n"
+			"INFO: a reset or power cycle is required "
+			"for the new settings to take effect.");
 
 	return ERROR_OK;
 }
@@ -1114,7 +1116,9 @@ COMMAND_HANDLER(stm32x_handle_options_write_command)
 		return ERROR_OK;
 	}
 
-	command_print(CMD_CTX, "stm32x write options complete");
+	command_print(CMD_CTX, "stm32x write options complete.\n"
+				"INFO: a reset or power cycle is required "
+				"for the new settings to take effect.");
 
 	return ERROR_OK;
 }