soc: qcom: glink: Move ctx initialization of xprt ptr

In glink_open function, channel context initialization with transport
pointer is done quite after after its creation. This create race condition,
if parallel thread try to use transport pointer of ctx.

Ctx is initialized with transport pointer right at the time of its
creation.

CRs-Fixed: 2061645
Change-Id: Idcddf1ab10b8673a20bc1f23d8702bf870f79dbd
Signed-off-by: Dhoat Harpal <hdhoat@codeaurora.org>