Revert "msm: kgsl: Device mutex lock for kgsl_cancel_event"

This reverts commit 43371a3f85e286627654e10caae62db22defe6ea.

CRs-Fixed: 765051
Change-Id: Ic42960234e78a258a6918fcc2875ecc502e0e530
Signed-off-by: Anupam Sakargayan <asakarga@codeaurora.org>
1 file changed