fix selective suspend on RP2040

the tmk_core chibios protocol_pre_task does not
process any usb events when the host is in suspend.

I think there is a race condition where the usb_event_queue_task
will not be processed depending on when usb goes to sleep.
so we may fall into the
while (USB_DRIVER.state == USB_SUSPENDED) {
which comes directly from the hardware interrupt.
and never process pending events in
usb_event_queue_task();

Signed-off-by: Kieran Levin <ktl@frame.work>

platforms/chibios/suspend.c

@@ -22,7 +22,7 @@ void suspend_power_down(void) {
     // on AVR, this enables the watchdog for 15ms (max), and goes to
     // SLEEP_MODE_PWR_DOWN
 
-    wait_ms(17);
+    wait_ms(5);
 }
 
 /** \brief suspend wakeup condition

tmk_core/protocol/chibios/chibios.c

@@ -190,6 +190,7 @@ void protocol_pre_task(void) {
                  * the bus and get our keyboard out of suspension. */
                 usbWakeupHost(&USB_DRIVER);
             }
+            usb_event_queue_task();
         }
         /* after a successful wakeup a USB_EVENT_WAKEUP is signaled to QMK by
          * ChibiOS, which triggers a wakeup callback that restores the state of