This adds pincontrol driver for tlmm block found in SM8350 SoC

This patch is based on initial code downstream by Raghavendra.
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20210205140132.274242-3-vkoul@kernel.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>