MIPS: Octeon: remove mips dma-default stubs

Octeon doesn't use the dma-default code, and now doesn't built it either,
so these stubs can be removed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Patchwork: https://patchwork.linux-mips.org/patch/19537/
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Tom Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: iommu@lists.linux-foundation.org
Cc: linux-mips@linux-mips.org

arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h

@@ -4,11 +4,6 @@
  * for more details.
  *
  * Copyright (C) 2006  Ralf Baechle <ralf@linux-mips.org>
- *
- *
- * Similar to mach-generic/dma-coherence.h except
- * plat_device_is_coherent hard coded to return 1.
- *
  */
 #ifndef __ASM_MACH_CAVIUM_OCTEON_DMA_COHERENCE_H
 #define __ASM_MACH_CAVIUM_OCTEON_DMA_COHERENCE_H
@@ -18,49 +13,6 @@
 struct device;
 
 extern void octeon_pci_dma_init(void);
-
-static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
-	size_t size)
-{
-	BUG();
-	return 0;
-}
-
-static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
-	struct page *page)
-{
-	BUG();
-	return 0;
-}
-
-static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
-	dma_addr_t dma_addr)
-{
-	BUG();
-	return 0;
-}
-
-static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr,
-	size_t size, enum dma_data_direction direction)
-{
-	BUG();
-}
-
-static inline int plat_dma_supported(struct device *dev, u64 mask)
-{
-	BUG();
-	return 0;
-}
-
-static inline int plat_device_is_coherent(struct device *dev)
-{
-	return 1;
-}
-
-static inline void plat_post_dma_flush(struct device *dev)
-{
-}
-
 extern char *octeon_swiotlb;
 
 #endif /* __ASM_MACH_CAVIUM_OCTEON_DMA_COHERENCE_H */