arch/*: remove unused isa_page_to_bus()

isa_page_to_bus() is deprecated and is no longer used anywhere.  Remove
it entirely.

Link: http://lkml.kernel.org/r/20190613161155.16946-1-steve@sk2.org
Signed-off-by: Stephen Kitt <steve@sk2.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/alpha/include/asm/io.h

@@ -93,11 +93,6 @@ static inline void * phys_to_virt(unsigned long address)
 
 #define page_to_phys(page)	page_to_pa(page)
 
-static inline dma_addr_t __deprecated isa_page_to_bus(struct page *page)
-{
-	return page_to_phys(page);
-}
-
 /* Maximum PIO space address supported?  */
 #define IO_SPACE_LIMIT 0xffff
 

arch/arm/include/asm/io.h

@@ -30,7 +30,6 @@
  * ISA I/O bus memory addresses are 1:1 with the physical address.
  */
 #define isa_virt_to_bus virt_to_phys
-#define isa_page_to_bus page_to_phys
 #define isa_bus_to_virt phys_to_virt
 
 /*

arch/mips/include/asm/io.h

@@ -149,8 +149,6 @@ static inline void *isa_bus_to_virt(unsigned long address)
 	return phys_to_virt(address);
 }
 
-#define isa_page_to_bus page_to_phys
-
 /*
  * However PCI ones are not necessarily 1:1 and therefore these interfaces
  * are forbidden in portable PCI drivers.

arch/x86/include/asm/io.h

@@ -165,7 +165,6 @@ static inline unsigned int isa_virt_to_bus(volatile void *address)
 {
 	return (unsigned int)virt_to_phys(address);
 }
-#define isa_page_to_bus(page)	((unsigned int)page_to_phys(page))
 #define isa_bus_to_virt		phys_to_virt
 
 /*