pm2fb: free cmap memory on module remove

Release cmap memory allocated in the probe function.

Signed-off-by: Krzysztof Helt <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/video/pm2fb.c

···
 	release_mem_region(fix->mmio_start, fix->mmio_len);
 
 	pci_set_drvdata(pdev, NULL);
+	fb_dealloc_cmap(&info->cmap);
 	kfree(info->pixmap.addr);
 	kfree(info);
 }