qcom: wcd934x: add pinctrl driver for wcd934x

WCD934X audio codec has a GPIO controller which can support
5 GPIO's. Add a pinctrl driver to handle GPIO's of wcd934x.

CRs-Fixed: 1041199
Change-Id: I0489f9149cfd6ec7af056d074cb1869a705f9eff
Signed-off-by: Yeleswarapu Nagaradhesh <nagaradh@codeaurora.org>
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>