arm64: defconfig: add spmi and usb related configs

This patch adds kconfigs for spmi bus support, pinctrl drivers and usb
related to get USB working on Qualcomm DB410C board.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>