add more logging to host stack

tested host with lpc4357, don't use fpu with lpc m4 since it seems to
cause hardfault (stack does not make use of fpu anyway).

src/class/msc/msc_host.c

@@ -310,6 +310,7 @@ bool msch_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_interface_t const *it
   (*p_length) += sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t);
 
   //------------- Get Max Lun -------------//
+  TU_LOG2("MSC Get Max Lun\r\n");
   tusb_control_request_t request = {
         .bmRequestType_bit = { .recipient = TUSB_REQ_RCPT_INTERFACE, .type = TUSB_REQ_TYPE_CLASS, .direction = TUSB_DIR_IN },
         .bRequest = MSC_REQ_GET_MAX_LUN,