video: dcu: Add Sii9022A HDMI Transmitter support

On LS1021ATWR, Silicon's Sii9022A HDMI Transmitter
is used. This patch adds the common setting for this
chip.

Signed-off-by: Alison Wang <alison.wang@freescale.com>
diff --git a/board/freescale/common/dcu_sii9022a.h b/board/freescale/common/dcu_sii9022a.h
new file mode 100644
index 0000000..de76733
--- /dev/null
+++ b/board/freescale/common/dcu_sii9022a.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef __DCU_HDMI_SII9022A__
+#define __DCU_HDMI_SII9022A__
+
+/* Programming of Silicon SII9022A connector HDMI Transmitter*/
+int dcu_set_dvi_encoder(struct fb_videomode *videomode);
+
+#endif