Add register definitions for SAM4L BPM and SCIF blocks; SAM4L clock initialization now selects an optimal  power scaling mode
Add register definitions for SAM4L BPM and SCIF blocks
Add flow control support to the STM32 serial driver; Fix some issues with UART2 and 5.  From Lorenz Meier and Mike Smith
Fix a backward conditional that cause the STM32 usb host driver to fail to detect disconnection events.  From Scott
Add SAM4L BSCIF register definition file