shmbridge: Add shmbridge driver snapshot for lahaina

Add snapshot for qtee_shmbridge from msm-4.19 commit 4260f49233b7
("drivers: soc: qcom: enable shared memory bridge in hypervisor").

Change-Id: I3247eedc0fbcebd3db212e8835d8a68090123ee4
Signed-off-by: Zhen Kong <zkong@codeaurora.org>