MN10300: Discard duplicate PFN_xxx() macros

Discard duplicate PFN_xxx() macros from arch code as they're now in the
general headers.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/mn10300/kernel/setup.c

@@ -136,10 +136,6 @@ void __init setup_arch(char **cmdline_p)
 	data_resource.start = virt_to_bus(&_etext);
 	data_resource.end = virt_to_bus(&_edata)-1;
 
-#define PFN_UP(x)	(((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
-#define PFN_DOWN(x)	((x) >> PAGE_SHIFT)
-#define PFN_PHYS(x)	((x) << PAGE_SHIFT)
-
 	start_pfn = (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT);
 	kstart_pfn = PFN_UP(__pa(&_text));
 	free_pfn = PFN_UP(__pa(&_end));