Fix some errors in how STM32 USB F3 state was being handled. Fix is correct,...

Fix some errors in how STM32 USB F3 state was being handled.  Fix is correct, but does not change behavior

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5639 42af7a65-404d-4744-a932-0658087f49c3