pbio/drv/bluetooth: Don't wait on power initialization.

Since all Bluetooth commands are buffered and handled by the event loop, we don't need to wait for the driver to fully power on before leaving `pbdrv`.

This allows power on to complete in the background while we initialize pbio and do hmi boot animations in pbsys, saving about half the boot time on SPIKE Prime.

Author: laurensvalk

lib/pbio/drv/bluetooth/bluetooth.c

@@ -66,7 +66,6 @@ void pbdrv_bluetooth_init(void) {
     // as soon as the previous one completes + 1 byte for ring buf pointer
     static uint8_t stdout_buf[PBDRV_BLUETOOTH_MAX_CHAR_SIZE * 2 + 1];
     lwrb_init(&stdout_ring_buf, stdout_buf, PBIO_ARRAY_SIZE(stdout_buf));
-    pbio_busy_count_up();
 
     pbdrv_bluetooth_init_hci();
 }
@@ -435,8 +434,6 @@ pbio_error_t pbdrv_bluetooth_process_thread(pbio_os_state_t *state, void *contex
 
     DEBUG_PRINT("Bluetooth is now on and initialized.\n");
 
-    pbio_busy_count_down();
-
     pbio_os_timer_set(&status_timer, PBDRV_BLUETOOTH_STATUS_UPDATE_INTERVAL);
 
     // Service scheduled tasks as long as Bluetooth is enabled.