Fixed warning: no previous prototype for 'vcn_dec_sw_ring_emit_fence'.
v2: regenerate patch after git rebase.
v3: update commit message.
Signed-off-by: James Zhu <James.Zhu@amd.com> Reported-by: kernel test robot <lkp@intel.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>