Renamed ENDPOINT_DOUBLEBANK_SUPPORTED() to ENDPOINT_BANKS_SUPPORTED() and changed it to return the maximum number of supported banks for the given endpoint.

LUFA/ManPages/ChangeLog.txt

@@ -48,6 +48,8 @@
   *  - Changed default value for the reset polarity parameter in the AVRISP-MKII project so that it defaults to active low drive
   *  - Changed configuration descriptor parser for all host mode projects and class drivers to ensure better compatibility with devices
   *  - Moved the USB mode specifier constants into a new enum, so that they are semantically related to one another
+  *  - Renamed ENDPOINT_DOUBLEBANK_SUPPORTED() to ENDPOINT_BANKS_SUPPORTED() and changed it to return the maximum number of supported banks for
+  *    the given endpoint
   *
   *  <b>Fixed:</b>
   *  - Fixed USB_GetHIDReportItemInfo() function modifying the given report item's data when the report item does not exist

LUFA/ManPages/MigrationInformation.txt

@@ -31,6 +31,9 @@
  *      eliminate any casting of descriptor pointers to a non-const pointer.
  *    - The names of the class specific descriptor type defines in the USB Class drivers have changed - refer to the driver documentation
  *      for each class driver for the new class specific descriptor type names.
+ *    - The ENDPOINT_DOUBLEBANK_SUPPORTED() macro is has been renamed \ref ENDPOINT_BANKS_SUPPORTED() and now returns the total number of
+ *      banks supported by the given endpoint. Existing code should switch to the new naming scheme, and test that the return value of the
+ *      macro is equal to or greated than 2 to regain the previous functionality.
  *
  *  <b>Host Mode</b>
  *    - Pipes MUST be allocated in ascending order to ensure that bank corruption does not occur. Ensure that your user application