MIPS: Remove unused function dump_au1000_dma_channel() in dma.c

The dump_au1000_dma_channel() has not been used since
commit d56b9b9c ("[PATCH] The scheduled removal of some OSS
drivers"), so remove it.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/alchemy/common/dma.c

@@ -131,29 +131,6 @@ static const struct dma_dev dma_dev_table_bank2[DMA_NUM_DEV_BANK2] = {
 	{ AU1100_SD1_PHYS_ADDR + 0x04, DMA_DS | DMA_DW8 | DMA_DR }	/* coherent */
 };
 
-void dump_au1000_dma_channel(unsigned int dmanr)
-{
-	struct dma_chan *chan;
-
-	if (dmanr >= NUM_AU1000_DMA_CHANNELS)
-		return;
-	chan = &au1000_dma_table[dmanr];
-
-	printk(KERN_INFO "Au1000 DMA%d Register Dump:\n", dmanr);
-	printk(KERN_INFO "  mode = 0x%08x\n",
-	       __raw_readl(chan->io + DMA_MODE_SET));
-	printk(KERN_INFO "  addr = 0x%08x\n",
-	       __raw_readl(chan->io + DMA_PERIPHERAL_ADDR));
-	printk(KERN_INFO "  start0 = 0x%08x\n",
-	       __raw_readl(chan->io + DMA_BUFFER0_START));
-	printk(KERN_INFO "  start1 = 0x%08x\n",
-	       __raw_readl(chan->io + DMA_BUFFER1_START));
-	printk(KERN_INFO "  count0 = 0x%08x\n",
-	       __raw_readl(chan->io + DMA_BUFFER0_COUNT));
-	printk(KERN_INFO "  count1 = 0x%08x\n",
-	       __raw_readl(chan->io + DMA_BUFFER1_COUNT));
-}
-
 /*
  * Finds a free channel, and binds the requested device to it.
  * Returns the allocated channel number, or negative on error.

arch/mips/include/asm/mach-au1x00/au1000_dma.h

@@ -124,7 +124,6 @@ extern int request_au1000_dma(int dev_id,
 extern void free_au1000_dma(unsigned int dmanr);
 extern int au1000_dma_read_proc(char *buf, char **start, off_t fpos,
 				int length, int *eof, void *data);
-extern void dump_au1000_dma_channel(unsigned int dmanr);
 extern spinlock_t au1000_dma_spin_lock;
 
 static inline struct dma_chan *get_dma_chan(unsigned int dmanr)