Spare 4s for rebooting

I add some comments in s2885/auto.c.

In auto.c call soft2_reset directly instead of jmp to __cpu_reset

#if 0

asm volatile ("jmp __cpu_reset");

#else

/* cpu reset also reset the memtroller ????

need soft_reset to reset all except keep HT link freq and width */

/* So we don't need to

1. jmp to __cpu_reset

2. jmp to __main to copy ROM to ram (It costs some time)

3. call hardwaremain(), it will according to boot_complete to issue hard_reset in southbridge.

(Actually it is soft2_reset(); --- without call hard_reset, the memory is corrupted.

We will call soft2_reset directly to spare time in 1 and 2 and 3.2

*/

distinguish_cpu_resets();

soft2_reset();

#endif