Add INTEGER_TO_ADDRESS to hadle nasty harvard architectures that do

funnies to integer to address conversions.

gdb/config/mips/tm-mips.h

@@ -499,9 +499,5 @@ typedef unsigned long t_inst;	/* Integer big enough to hold an instruction */
 extern void mips_set_processor_type_command (char *, int);
 
 
-/* MIPS sign extends addresses */
-#define POINTER_TO_ADDRESS(TYPE,BUF) (signed_pointer_to_address (TYPE, BUF))
-#define ADDRESS_TO_POINTER(TYPE,BUF,ADDR) (address_to_signed_pointer (TYPE, BUF, ADDR))
-
 /* Single step based on where the current instruction will take us.  */
 extern void mips_software_single_step (enum target_signal, int);