drm: fix leaked dma handles after removing drm_pci_free

After removing drm_pci_alloc/free, some instances where drm_pci_free()
would have kfreed the dma handle were skipped.

Ensure these handles are freed properly.
Signed-off-by: Joseph Kogut <joseph.kogut@gmail.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210518212859.4148903-1-joseph.kogut@gmail.com

drivers/gpu/drm/drm_bufs.c

@@ -685,6 +685,7 @@ static void drm_cleanup_buf_error(struct drm_device *dev,
 						  dmah->size,
 						  dmah->vaddr,
 						  dmah->busaddr);
+				kfree(dmah);
 			}
 		}
 		kfree(entry->seglist);

drivers/gpu/drm/r128/ati_pcigart.c

@@ -71,6 +71,8 @@ static void drm_ati_free_pcigart_table(struct drm_device *dev,
 	drm_dma_handle_t *dmah = gart_info->table_handle;
 
 	dma_free_coherent(dev->dev, dmah->size, dmah->vaddr, dmah->busaddr);
+	kfree(dmah);
+
 	gart_info->table_handle = NULL;
 }