video: add missing framebuffer_release in error path

This patch fixes a memory leak in the error path.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/drivers/video/cg6.c b/drivers/video/cg6.c
index 4ffad90..179e96c 100644
--- a/drivers/video/cg6.c
+++ b/drivers/video/cg6.c
@@ -821,6 +821,7 @@
 
 out_unmap_regs:
 	cg6_unmap_regs(op, info, par);
+	framebuffer_release(info);
 
 out_err:
 	return err;