dmaengine: idxd: Remove unused declarations

Commit c05257b5 ("dmanegine: idxd: open code the dsa_drv registration")
removed idxd_{un}register_driver() definitions but not the declarations.
Commit 034b3290 ("dmaengine: idxd: create idxd_device sub-driver")
declared idxd_{un}register_idxd_drv() but never implemented it.
Commit 8f47d1a5 ("dmaengine: idxd: connect idxd to dmaengine
subsystem") declared idxd_parse_completion_status() but never implemented
it.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/20230817114135.50264-1-yuehaibing@huawei.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/idxd/idxd.h

@@ -651,8 +651,6 @@ int idxd_register_bus_type(void);
 void idxd_unregister_bus_type(void);
 int idxd_register_devices(struct idxd_device *idxd);
 void idxd_unregister_devices(struct idxd_device *idxd);
-int idxd_register_driver(void);
-void idxd_unregister_driver(void);
 void idxd_wqs_quiesce(struct idxd_device *idxd);
 bool idxd_queue_int_handle_resubmit(struct idxd_desc *desc);
 void multi_u64_to_bmap(unsigned long *bmap, u64 *val, int count);
@@ -664,8 +662,6 @@ void idxd_mask_error_interrupts(struct idxd_device *idxd);
 void idxd_unmask_error_interrupts(struct idxd_device *idxd);
 
 /* device control */
-int idxd_register_idxd_drv(void);
-void idxd_unregister_idxd_drv(void);
 int idxd_device_drv_probe(struct idxd_dev *idxd_dev);
 void idxd_device_drv_remove(struct idxd_dev *idxd_dev);
 int drv_enable_wq(struct idxd_wq *wq);
@@ -710,7 +706,6 @@ int idxd_enqcmds(struct idxd_wq *wq, void __iomem *portal, const void *desc);
 /* dmaengine */
 int idxd_register_dma_device(struct idxd_device *idxd);
 void idxd_unregister_dma_device(struct idxd_device *idxd);
-void idxd_parse_completion_status(u8 status, enum dmaengine_tx_result *res);
 void idxd_dma_complete_txd(struct idxd_desc *desc,
 			   enum idxd_complete_type comp_type, bool free_desc);