target: Make TFO->check_stop_free return free status

This patch converts target_core_fabric_ops->check_stop_free() usage in
transport_cmd_check_stop() and associated fabric module usage to
return '1' when the passed se_cmd has been released directly within
->check_stop_free(), or return '0' when the passed se_cmd has not
been released.

This addresses an issue where transport_cmd_finish_abort() ->
transport_cmd_check_stop_to_fabric() was leaking descriptors during
LUN_RESET for modules using ->check_stop_free(), but not directly
releasing se_cmd in all cases.

Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>

drivers/target/tcm_fc/tfc_cmd.c

@@ -112,9 +112,10 @@ void ft_release_cmd(struct se_cmd *se_cmd)
 	ft_free_cmd(cmd);
 }
 
-void ft_check_stop_free(struct se_cmd *se_cmd)
+int ft_check_stop_free(struct se_cmd *se_cmd)
 {
 	transport_generic_free_cmd(se_cmd, 0);
+	return 1;
 }
 
 /*