[PARISC] Enable free_initrd_mem()

I think it's time to enable free_initrd_mem() again...
Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

arch/parisc/mm/init.c

@@ -1013,8 +1013,8 @@ void flush_tlb_all(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-#if 0
-	if (start < end)
+	if (start >= end)
+		return;
 	printk(KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
 	for (; start < end; start += PAGE_SIZE) {
 		ClearPageReserved(virt_to_page(start));
@@ -1023,6 +1023,5 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 		num_physpages++;
 		totalram_pages++;
 	}
-#endif
 }
 #endif