nvme: make nvme_get_log_ext non-static

Enable the lightnvm integration to use the nvme_get_log_ext()
function.
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/nvme/host/core.c

@@ -2216,7 +2216,7 @@ static int nvme_init_subsystem(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id)
 	return ret;
 }
 
-static int nvme_get_log_ext(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
+int nvme_get_log_ext(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 			    u8 log_page, void *log,
 			    size_t size, size_t offset)
 {

drivers/nvme/host/nvme.h

@@ -429,6 +429,9 @@ int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
 int nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl);
 
+int nvme_get_log_ext(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
+		u8 log_page, void *log, size_t size, size_t offset);
+
 extern const struct attribute_group nvme_ns_id_attr_group;
 extern const struct block_device_operations nvme_ns_head_ops;