Add support for Qualcomm MSM8916 SoC in arm64 Kconfig and defconfig.
Enable MSM8916 clock, pin control, and MSM serial driver utilized by
MSM8916 and Qualcomm SoCs in general.
Signed-off-by: Kumar Gala <galak@codeaurora.org> Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>