reduce s3 baudrate to prevent usb isssue, reset rp2040 usb for board test example

hw/bsp/rp2040/family.c

@@ -166,6 +166,12 @@ void board_init(void)
 #if CFG_TUH_ENABLED
   // set portfunc to host !!!
 #endif
+
+#if !CFG_TUD_ENABLED && !CFG_TUH_ENABLED
+  // board test exxample, reset usb controller
+  reset_block(RESETS_RESET_USBCTRL_BITS);
+  unreset_block_wait(RESETS_RESET_USBCTRL_BITS);
+#endif
 }
 
 //--------------------------------------------------------------------+

test/hil/hil_pi4.json

@@ -15,7 +15,7 @@
             ],
             "flasher": "esptool",
             "flasher_sn": "461cb8d7decdeb119be9b506e93fd3f1",
-            "flasher_args": "-b 1500000"
+            "flasher_args": "-b 921600"
         }
     ]
 }