drm/etnaviv: fix ref count leak via pm_runtime_get_sync
in etnaviv_gpu_submit, etnaviv_gpu_recover_hang, etnaviv_gpu_debugfs, and etnaviv_gpu_init the call to pm_runtime_get_sync increments the counter even in case of failure, leading to incorrect ref count. In case of failure, decrement the ref count before returning.
Signed-off-by: Navid Emamdoost navid.emamdoost@gmail.com Signed-off-by: Lucas Stach l.stach@pengutronix.de (cherry picked from commit c5d5a32e)