fbdev: s3fb: fix potential memory leak in s3_pci_probe()

In s3_pci_probe(), the memory allocated for modelist using
fb_videomode_to_modelist() is not freed in subsequent error paths.
Fix that by calling fb_destroy_modelist()

Fixes: 86c0f043a7 ("s3fb: add DDC support")
Cc: stable@vger.kernel.org
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Signed-off-by: Helge Deller <deller@gmx.de>

drivers/video/fbdev/s3fb.c

@@ -1446,6 +1446,7 @@ err_reg_fb:
 err_alloc_cmap:
 err_find_mode:
 #ifdef CONFIG_FB_S3_DDC
+	fb_destroy_modelist(&info->modelist);
 	if (par->ddc_registered)
 		i2c_del_adapter(&par->ddc_adapter);
 	if (par->mmio)