pinctrl: ingenic: add hdmi-ddc pin control group

Signed-off-by: Paul Boddie <paul@boddie.org.uk>
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Link: https://lore.kernel.org/r/010d6ad3473fb4b1f1041888a071796180cdd838.1582913973.git.hns@goldelico.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>