The TDA998x is a HDMI transmitter with a TDA9950 CEC engine integrated
onto the same die.  Add support for the TDA9950 CEC engine to the
TDA998x driver.
Reviewed-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>