add test for pipe_interrupt_xfer

implement keyboard app code
- forcefully place keyboard_report in RAM section 3
change used bit in qtd from reserved in buffer[1] to alternate link
add code for fake ehci controller runs on period interrupt
change signature of tusbh_hid_keyboard_get_report
- tusb_keyboard_report_t* to uint8_t*
implement period (interrupt) complete isr processing

tests/test/host/ehci/test_pipe_bulk_xfer.c

@@ -49,7 +49,6 @@
 
 usbh_device_info_t usbh_devices[TUSB_CFG_HOST_DEVICE_MAX+1];
 
-uint8_t const control_max_packet_size = 64;
 uint8_t const hub_addr = 2;
 uint8_t const hub_port = 2;
 uint8_t dev_addr;