optee: update outdated comment

The function cmd_alloc_suppl() was renamed as
optee_rpc_cmd_alloc_suppl() in commit c51a564
("optee: isolate smc abi").  Update the comment
accordingly.

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Reviewed-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

Author: JuliaLawall

drivers/tee/optee/rpc.c

@@ -247,8 +247,8 @@ void optee_rpc_cmd_free_suppl(struct tee_context *ctx, struct tee_shm *shm)
 	param.u.value.c = 0;
 
 	/*
-	 * Match the tee_shm_get_from_id() in cmd_alloc_suppl() as secure
-	 * world has released its reference.
+	 * Match the tee_shm_get_from_id() in optee_rpc_cmd_alloc_suppl()
+	 * as secure world has released its reference.
 	 *
 	 * It's better to do this before sending the request to supplicant
 	 * as we'd like to let the process doing the initial allocation to