preparation for x86/acpica/acpi_wakeup.c

[Mitsuru IWASAKI]

Hi,

http://people.freebsd.org/~iwasaki/acpi/x86-acpi_wakeup-20120606.diff

I've noticed that SVN rev 210777 commit log, said 
'savectx() is only used for panic dump (dumppcb) and kdb (stoppcbs)'.
So suspendctx() in i386 version should be merged into savectx().

I hope this would be the last patches.

Thanks!