arm64: defconfig: Enable Qualcomm SM8250 pinctrl driver

arm64: defconfig: Enable Qualcomm SM8250 pinctrl driver

The SM8250 pinctrl driver provides pin configuration, pin muxing and
GPIO pin control for many pins on the SM8250 SoC.

Reviewed-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200622220048.717073-1-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>