platform: msm: Add snapshot of GENI serial engine driver

This snapshot is taken as of msm-4.14 'commit <64b5086c>
("Merge "qcom-geni-se: Set DMA mask to support 64 bit DMA."").
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.

Change-Id: Icf6195a4241cb97c1ed4638cfdf7a3067b28aab2
Signed-off-by: Vipin Deep Kaur <vkaur@codeaurora.org>