Fix the real issue with AMS bootloader USB mode. A call to usb_enable was missing in usb.c when using the USB stack and USB_DETECT_BY_CORE was not enabled. Try to do it in a clean-ish way.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31245 a1c6a512-1295-4272-9138-f99709370657
2 files changed