[ARM] 4531/1: remove is_in_rom() protptype

Remove unused is_in_rom() function prototype.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/asm-arm/pgtable-nommu.h b/include/asm-arm/pgtable-nommu.h
index b186bc8..33c83dd 100644
--- a/include/asm-arm/pgtable-nommu.h
+++ b/include/asm-arm/pgtable-nommu.h
@@ -74,7 +74,6 @@
  * These would be in other places but having them here reduces the diffs.
  */
 extern unsigned int kobjsize(const void *objp);
-extern int is_in_rom(unsigned long);
 
 /*
  * No page table caches to initialise.