This commit add a config STM32_OTGFS_VBUS_ CONTROL which lets us selectively disable VBus sensing and control. I also sneaked in a change to disable the configgpio call for the ID pin, which is only used in OTG mode which isn't supported yet. The only pins that need to be initialized should be OTGFS_DP and OTGFS_DM.
These changes let a USB mouse enumerate on my platform if it's plugged in on power-up. Plugging, unplugging, clicking, or moving the mouse cause NSH to stop responding. Because I'm using the ramlog, I don't have useful debug messaging yet, so there's a lot more work I have to do to troubleshoot it or get my JTAG debugging set up, but these patches shouldn't hurt anything. I'm hoping my issue is something simple I overlooked in configuration.
I'm planning to add similar changes for the OTGHS peripheral (using integrated full speed phy) but I still need to test those changes before submitting patches.
