pinctrl: qcom: add pinctrl driver for msm8953

Add inititial pinctrl driver for MSM8953 platform. Compatible SoCs are:
MSM8953, APQ8053, SDM(SDA)450, SDM(SDA)632.
Based off CAF implementation.

Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
Signed-off-by: Vladimir Lypak <junak.pub@gmail.com>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20201007160611.942754-1-junak.pub@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>