fbdev: carminefb: fix potential memory leak in alloc_carmine_fb()

The memory allocated for modelist in fb_videomode_to_modelist() is not
freed in the subsequent error path.
Fix that by calling fb_destroy_modelist()

Fixes: 2ece5f43b0 ("fbdev: add the carmine FB driver")
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/carminefb.c

@@ -589,6 +589,7 @@ static int alloc_carmine_fb(void __iomem *regs, void __iomem *smem_base,
 	return 0;
 
 err_dealloc_cmap:
+	fb_destroy_modelist(&info->modelist);
 	fb_dealloc_cmap(&info->cmap);
 err_free_fb:
 	framebuffer_release(info);