msm: wfd: Lock the state in vsg_start

Protect the state in vsg_start with a mutex as it can be accessed from
other threads.

CRs-Fixed: 634425
Change-Id: I823b34f1b310092ea100d366d92a3293a0c74e6d
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>
1 file changed