Print out the device type which is used

Print out the device type which is used for generating images.

Author: manzke

ldm/generate.py

@@ -172,6 +172,7 @@ def __init__(
         # device to Generate(). However the device was then ignored, so
         # it wasn't actually doing anything. This logic could be reinstated.
         device_type = choose_torch_device()
+        print(f'>> Using device_type {device_type}')
         self.device = torch.device(device_type)
         if full_precision:
             if self.precision != 'auto':