platform: msm: Add snapshot of GENI serial engine driver

This snapshot is taken as of msm-4.9 'commit <e8a6a75991d4>
("Merge "usb: core: Add usb_set_interface_timeout API"")'.

GENI serial engine driver provides common functionality used by
other serial bus drivers (such as I2c, SPI, UART), and does
resource management for those drivers.

CRs-Fixed: 2124301
Change-Id: I39ef9e7430c7b420b91be092509985f30a21442a
Signed-off-by: Karthik Ramasubramanian <kramasub@codeaurora.org>
Signed-off-by: Sagar Dharia <sdharia@codeaurora.org>