soc: qcom: glink: Reduce code under spinlock

Glink core channel cleanup has a lot of code under spinlock with
preemption disabled this leads to deadlock scenerio.

Spinklock is used only for critical section, rest of the code is
be without spinlock.

CRs-Fixed: 1060407
Change-Id: I577dbff1cf2ee3711e1879aaa6dc48c72f98b98c
Signed-off-by: Dhoat Harpal <hdhoat@codeaurora.org>