comment out errata that stm32u0 will not hit

Author: asiekierka

src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c

@@ -447,10 +447,11 @@ void dcd_int_handler(uint8_t rhport) {
        *
        * Note: this errata may also apply to G0, U5, H5 etc.
        */
-      volatile uint32_t cycle_count = 20; // defined as PCD_RX_PMA_CNT in stm32 hal_driver
+      // Since the U0 only runs at up to 48-56MHz, 40-50 cycles will probably pass anyway.
+      /* volatile uint32_t cycle_count = 20; // defined as PCD_RX_PMA_CNT in stm32 hal_driver
       while (cycle_count > 0U) {
         cycle_count--; // each count take 3 cycles (1 for sub, jump, and compare)
-      }
+      } */
       #endif
 
       if (ep_reg & USB_EP_SETUP) {