ARM: dts: apq8064: move sdcc3 pinctrls out of baord file

This patch move sdcc3 pinctrl nodes out of board file, so that
other boards do not duplicate the same thing.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>