ARM: defconfig: enable the MSM8660 pin controller

After enabling this I get pins, GPIO, keys and everything on
the MSM8660 surf (APQ8660 DragonBoard).

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>