powerpc/t1042RDB: Add Video - HDMI support

T1042 has internal display interface unit (DIU) for driving video.
T1042RDB supports video mode via
-LCD using TI enconder
-HDMI type interface via HDMI encoder

Chrontel, CH7301C encoder which is I2C programmable is used
as HDMI connector on T1042RDB.
This patch add support to
-enable Video interface for T1042RDB
-route qixis multiplexing to enable DIU-HDMI interface on board
-program DIU pixel clock gerenartor for T1042
-program HDMI encoder via I2C on board

This patch refer to the upstream diu patch
(337b0c52b3296f371d04aef71a833e09110e0e6b) for T1040qds.

Signed-off-by: Jason Jin <Jason.Jin@freescale.com>
Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
[York Sun: resolve conflict and move changes to T104xRDB.h]
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/board/freescale/t104xrdb/Makefile b/board/freescale/t104xrdb/Makefile
index 6cd304c..b9ef17f 100644
--- a/board/freescale/t104xrdb/Makefile
+++ b/board/freescale/t104xrdb/Makefile
@@ -11,6 +11,7 @@
 obj-y	+= cpld.o
 obj-y	+= eth.o
 obj-$(CONFIG_PCI)	+= pci.o
+obj-$(CONFIG_FSL_DIU_FB)+= diu.o
 endif
 obj-y	+= ddr.o
 obj-y	+= law.o