usb-phytec

Merge pull request #10 in PROCESSOR-SDK/usb from bugfix/PRSDK-1608-am335x-usb-bare-metal-fix to master

* commit 'e1f43a972cdc7094bd215040294294befd873dfc':
  Match interrupt handler prototypes with what OSAL expects
  Fix compiler error while building for debug build with DMA enabled
  Replace timer, interrupt, and UART APIs to those of OSAL and UART