fix broadcom UART ringbuf init

dhalbert · dhalbert · commit e25c195b789c · 2022-09-25T09:12:23.000-04:00
diff --git a/ports/broadcom/common-hal/busio/UART.c b/ports/broadcom/common-hal/busio/UART.c
@@ -211,7 +211,6 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
         // Use the provided buffer when given.
         if (receiver_buffer != NULL) {
             ringbuf_init(&self->ringbuf, receiver_buffer, receiver_buffer_size);
-            self->ringbuf = (ringbuf_t) { receiver_buffer, receiver_buffer_size };
         } else {
             // Initially allocate the UART's buffer in the long-lived part of the
             // heap. UARTs are generally long-lived objects, but the "make long-
