pinctrl: nomadik: stn8815 CLCD alternate functions

The STn8815 has 22 dedicated pins for CLCD with up to 16 bits
in parallel, but pins 32 thru 39 can be used for an additional
CLCD signal lines 16 thru 23.

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