sh: Kill off virt_to_bus()/bus_to_virt().

Wire up ARCH_NO_VIRT_TO_BUS, and kill off the remaining users. The
dma-mapping code really wanted virt_to_phys()/phys_to_virt() anyways,
there are no inherently special bus addresses.

Signed-off-by: Paul Mundt <[e-mail]>

arch/sh/Kconfig

···
 	bool
 	default n
 
+config ARCH_NO_VIRT_TO_BUS
+	def_bool y
+
 source "init/Kconfig"
 
 menu "System type"

include/asm-sh/dma-mapping.h

···
 {
 #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
 	if (dev->bus == &pci_bus_type)
-		return virt_to_bus(ptr);
+		return virt_to_phys(ptr);
 #endif
 	dma_cache_sync(dev, ptr, size, dir);
 
-	return virt_to_bus(ptr);
+	return virt_to_phys(ptr);
 }
 
 #define dma_unmap_single(dev, addr, size, dir)	do { } while (0)
···
 	if (dev->bus == &pci_bus_type)
 		return;
 #endif
-	dma_cache_sync(dev, bus_to_virt(dma_handle), size, dir);
+	dma_cache_sync(dev, phys_to_virt(dma_handle), size, dir);
 }
 
 static inline void dma_sync_single_range(struct device *dev,
···
 	if (dev->bus == &pci_bus_type)
 		return;
 #endif
-	dma_cache_sync(dev, bus_to_virt(dma_handle) + offset, size, dir);
+	dma_cache_sync(dev, phys_to_virt(dma_handle) + offset, size, dir);
 }
 
 static inline void dma_sync_sg(struct device *dev, struct scatterlist *sg,

include/asm-sh/floppy.h

···
 {
 	if(can_use_virtual_dma == 2) {
 		if((unsigned int) addr >= (unsigned int) high_memory ||
-		   virt_to_bus(addr) >= 0x10000000)
+		   virt_to_phys(addr) >= 0x10000000)
 			use_virtual_dma = 1;
 		else
 			use_virtual_dma = 0;
···
 	doing_pdma = 0;
 	clear_dma_ff(FLOPPY_DMA);
 	set_dma_mode(FLOPPY_DMA,mode);
-	set_dma_addr(FLOPPY_DMA,virt_to_bus(addr));
+	set_dma_addr(FLOPPY_DMA,virt_to_phys(addr));
 	set_dma_count(FLOPPY_DMA,size);
 	enable_dma(FLOPPY_DMA);
 	return 0;

include/asm-sh/io.h

···
 #define virt_to_phys(address)	((unsigned long)(address))
 #endif
 
-#define virt_to_bus virt_to_phys
-#define bus_to_virt phys_to_virt
-#define page_to_bus page_to_phys
-
 /*
  * readX/writeX() are used to access memory mapped devices. On some
  * architectures the memory mapped IO stuff needs to be accessed