pinctrl: qcom: Add SC7180 pinctrl driver

Add initial pinctrl driver to support pin configuration with
pinctrl framework for SC7180

Signed-off-by: Jitendra Sharma <shajit@codeaurora.org>
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
[rnayak: modify to use upstream tile support
	 sort and squash some functions]
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20190806060536.18094-2-rnayak@codeaurora.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>