dt-bindings: soc: qcom: Update GLINK bindings

This snapshot is taken as of msm-4.14 'commit <67942dbf2187>
("Merge "net: netfilter: IRC DCC for private clients"")'.

Update the dt-bindings for the GLINK drivers from snapshot. The update
includes the bindings for the SPI and SPSS transport.

Change-Id: I47be2f8d1b4d732d2658261109c6f1341e42b2e4
Signed-off-by: Chris Lew <clew@codeaurora.org>