drm/amdgpu: initialize the last_jump_jiffies in atom_exec_context

The parameter "last_jump_jiffies" should be initialized
before being used in the function atom_op_jump.
Signed-off-by: Jesse Zhang <jesse.zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/atom.c

@@ -1243,6 +1243,7 @@ static int amdgpu_atom_execute_table_locked(struct atom_context *ctx, int index,
 	ectx.ps_size = params_size;
 	ectx.abort = false;
 	ectx.last_jump = 0;
+	ectx.last_jump_jiffies = 0;
 	if (ws) {
 		ectx.ws = kcalloc(4, ws, GFP_KERNEL);
 		ectx.ws_size = ws;