Change SGPIO CPLD decimation API interface to be one-based (decimation of 1 to 8).
SGPIO: Add CPLD RX Q channel inversion, API to control.
CPLD: Update bitstream files with RX Q channel flip.
Merge pull request #119 from jboone/cpld_q_invert

SGPIO API change and CPLD Q channel invert feature.