FogBugz #421702-2: implement Frame Buffer II for Display Port IP

commit  c1dbffae16df5a5041f69aae4c9f0b1d260f8b2d from
https://github.com/altera-opensource/linux-socfpga.git



Frame Buffer II implemntation for Display Port IP. The Intel PSG
(Altera) Video Image Processing Suite requires the Frame Reader
to be updated to Frame Buffer II. A new driver is required to
support the CSR for Frame Buffer II.

Signed-off-by: Ong Hean Loong <hean.loong.ong@intel.com>
Signed-off-by: Meng Li <Meng.Li@windriver.com>