Incorrect maximum number of USB endpoints

[vintagepc]

The AVR USB code hard-caps the number of endpoints at 5.

simavr/simavr/sim/avr_usb.c

Line 151 in ea4c450

struct _epstate ep_state[5];

simavr/simavr/sim/avr_usb.c

Line 156 in ea4c450

const uint8_t num_endpoints = 5;//sizeof (struct usb_internal_state.ep_state) / sizeof (struct usb_internal_state.ep_state[0]);

This is as expected for the AT90 example part but is too small for parts like the 32u4 which have USB defined and up to 7 configurable endpoints.

[leptun]

Also, is ENDPOINT_EPNUM_MASK correct? Right now it is 0x0F, but the AVR MCUs that support USB only ever use 3 bits, not 4. This could potentially result in writing a reserved bit in UENUM.