sparc32: Remove superfluous extern declarations for prom_*() functions

prom_meminit() and prom_ranges_init() are declared in <asm/oplib_32.h>.
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc/prom/init_32.c

@@ -31,9 +31,6 @@ struct linux_nodeops *prom_nodeops;
  * It gets passed the pointer to the PROM vector.
  */
 
-extern void prom_meminit(void);
-extern void prom_ranges_init(void);
-
 void __init prom_init(struct linux_romvec *rp)
 {
 	romvec = rp;