msm: sps: add SPS driver snapshot

Snapshot of SPS (Smart Peripheral Subsystem) driver as of msm-4.9
commit 1d7654e68e40 ("ARM: dts: msm: Add dtsi entries of USB for
SDM670").

Change-Id: Ic3e2810dccb8d32e27db163c34c8335f19dd6915
Signed-off-by: Yan He <yanhe@codeaurora.org>