powerpc/corenet2: Add SerDes for corenet2

powerpc/corenet2: Add SerDes for corenet2

Create new files to handle 2nd generation Chassis as the registers are
organized differently.

 - Add SerDes protocol parsing and detection
 - Add support of 4 SerDes
 - Add CPRI protocol in fsl_serdes.h
	The Common Public Radio Interface (CPRI) is publicly available
	specification that standardizes the protocol interface between the
	radio equipment control (REC) and the radio equipment (RE) in wireless
	basestations. This allows interoperability of equipment from different
	vendors,and preserves the software investment made by wireless service
	providers.

Signed-off-by: York Sun <[email protected]>
Signed-off-by: Prabhakar Kushwaha <[email protected]>
Signed-off-by: Shengzhou Liu <[email protected]>
Signed-off-by: Roy Zang <[email protected]>
Signed-off-by: Andy Fleming <[email protected]>