Alchemy power managment code.

[Ralf Baechle <ralf@linux-mips.org>]

The Alchemy code in arch/mips/au1000/common/power.c is one of the last
remaining users of pm_send_all() which happens to be a nop call because
nothing registers callbacks with pm_register.  So the pm_send_all() calls
can be removed.

Which leaves pm_do_suspend with no sensible code, so it can be removed.
And ripped like this pm_do_sleep looks it it may well no longer be
functioning.

So, anybody still using that stuff, does it provide any useful
functionality?  Does the CPU frequency stuff actually work?

  Ralf

PS: You should hear the engine of my chainsaw warming up ...