target: Cleanup unused target_core_base.h bits

This is a squashed version of the following target_core_base.h
cleanup patches:

    target: remove the unused SHUTDOWN_SIGS defintion
    target: remove unused se_mem leftovers
    target: remove the unused map_func_t typedef
    target: move TRANSPORT_IOV_DATA_BUFFER to the iscsi-specific code

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index d86e18d..4d01768 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -765,7 +765,7 @@
 	u32 iov_count = (cmd->se_cmd.t_data_nents == 0) ? 1 :
 				cmd->se_cmd.t_data_nents;
 
-	iov_count += TRANSPORT_IOV_DATA_BUFFER;
+	iov_count += ISCSI_IOV_DATA_BUFFER;
 
 	cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL);
 	if (!cmd->iov_data) {
diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h
index 470ed55..84818d7 100644
--- a/drivers/target/iscsi/iscsi_target_core.h
+++ b/drivers/target/iscsi/iscsi_target_core.h
@@ -57,6 +57,9 @@
 #define TA_PROD_MODE_WRITE_PROTECT	0
 #define TA_CACHE_CORE_NPS		0
 
+
+#define ISCSI_IOV_DATA_BUFFER		5
+
 enum tpg_np_network_transport_table {
 	ISCSI_TCP				= 0,
 	ISCSI_SCTP_TCP				= 1,
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index ee73f10..89b85dd 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -69,9 +69,6 @@
 struct kmem_cache *t10_alua_tg_pt_gp_cache;
 struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
 
-/* Used for transport_dev_get_map_*() */
-typedef int (*map_func_t)(struct se_task *, u32);
-
 static int transport_generic_write_pending(struct se_cmd *);
 static int transport_processing_thread(void *param);
 static int __transport_execute_tasks(struct se_device *dev);