drm/bochs: Fix some error handling paths in bochs_pci_probe()

The remove() function calls bochs_hw_fini() but this function is not called
in the error handling of the probe.

This call releases the resources allocated by bochs_hw_init() used in
bochs_load().

Update the probe and bochs_load() to call bochs_hw_fini() if an error
occurs after a successful bochs_hw_init() call.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: http://patchwork.freedesktop.org/patch/msgid/0e676e4d56ab5b10fcf22860081414445611dfa7.1655565953.git.christophe.jaillet@wanadoo.frSigned-off-by: Gerd Hoffmann <kraxel@redhat.com>

drivers/gpu/drm/tiny/bochs.c

@@ -583,13 +583,17 @@ static int bochs_load(struct drm_device *dev)
 
 	ret = drmm_vram_helper_init(dev, bochs->fb_base, bochs->fb_size);
 	if (ret)
-		return ret;
+		goto err_hw_fini;
 
 	ret = bochs_kms_init(bochs);
 	if (ret)
-		return ret;
+		goto err_hw_fini;
 
 	return 0;
+
+err_hw_fini:
+	bochs_hw_fini(dev);
+	return ret;
 }
 
 DEFINE_DRM_GEM_FOPS(bochs_fops);
@@ -664,11 +668,13 @@ static int bochs_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent
 
 	ret = drm_dev_register(dev, 0);
 	if (ret)
-		goto err_free_dev;
+		goto err_hw_fini;
 
 	drm_fbdev_generic_setup(dev, 32);
 	return ret;
 
+err_hw_fini:
+	bochs_hw_fini(dev);
 err_free_dev:
 	drm_dev_put(dev);
 	return ret;